App Development Cost Estimator
Scope your idea
1. What are you building?
See the cost, effort, timeline, and biggest drivers behind your app idea.
Enter 1–100 screens. Values above 30 remain ordinary scope estimates.
2. What does it need?
Twelve features. Basic and Advanced describe added behavior/integration beyond screen layout; feature backend work is counted here once.
3. How complex is it?
Custom UI, backend/database workflows, several integrations and normal production QA. Multiplier: 1×.
Illustrative rate assumptions in USD. Edit either endpoint to use Custom; no geographic market claim.
Advanced planning assumptions
4. Your estimate
Estimated development cost
$28,500 – $91,500
Early-stage planning range
- Estimated effort
- 570–1,075 hours
- Estimated timeline
- ≈ 7–14 weeks
- Rate assumption used · Typical
- $50–$85/hour
- Delivery capacity assumption
- 80 productive project hours/week
- Planning contingency
- 10% added to base effort
These are illustrative effort/rate assumptions for early planning, not market quotes.
Cost rounded outward to $500; effort to 5 hours. Calendar time can vary with dependencies, approvals, staffing, parallel work and waiting time.
App cost model v1.0 · Assumptions reviewed 2026-10-03Where the estimate comes from
Base effort: 518.65–975.775 hours. Contingency: 51.865–97.5775 hours. Total modeled effort before planning display rounding: 570.515–1,073.3525 hours.
| Component | Low hours | High hours | Low cost | High cost |
|---|---|---|---|---|
| Platform / foundation | 120 | 192 | $6,000.00 | $16,320.00 |
| Screens | 88 | 154 | $4,400.00 | $13,090.00 |
FeaturesFeature-level breakdown
| 146 | 241.6 | $7,300.00 | $20,536.00 |
| UI/UX | 46 | 74 | $2,300.00 | $6,290.00 |
| Backend / infrastructure | 16 | 32 | $800.00 | $2,720.00 |
| QA / testing | 55.5 | 154.9 | $2,775.00 | $13,166.50 |
| Project management / delivery | 47.15 | 127.28 | $2,357.50 | $10,818.38 |
| Planning contingency | 51.87 | 97.58 | $2,593.25 | $8,294.09 |
| Planning display rounding adjustment | -0.52 | 1.64 | -$25.75 | $265.03 |
| Total planning display | 570 | 1,075 | $28,500.00 | $91,500.00 |
Low cost = low hours × low rate; high cost = high hours × high rate. Detailed rows are shown to two decimals; the explicit display adjustment makes every column reconcile with the rounded headline. That adjustment is presentation only, not extra work or contingency.
Biggest cost drivers
Three largest modeled contributors, sorted by midpoint hours. Individual features replace the combined Features row in the ranking. Contingency is separate. This is a contribution ranking, not a recommendation.
- Platform / foundation
120–192 hours / $6,000.00 – $16,320.00
- Screens
88–154 hours / $4,400.00 – $13,090.00
- QA / testing
55.5–154.9 hours / $2,775.00 – $13,166.50
Preview removing selected features
Recalculates the whole model, including common backend allowance, QA, delivery overhead and contingency. These previews do not change inputs.
- Login / user accounts — Basic
If removed, modeled estimate decreases by approximately 45–90 hours / $2,000 – $7,500.
- Payments — Basic
If removed, modeled estimate decreases by approximately 55–105 hours / $2,500 – $9,000.
- Push notifications — Basic
If removed, modeled estimate decreases by approximately 25–60 hours / $1,000 – $5,000.
- Admin dashboard — Basic
If removed, modeled estimate decreases by approximately 70–135 hours / $3,500 – $11,500.
Lean MVP scenario
An example reduced-scope scenario using fixed rules, not professional advice about what you should build. Accounts, Payments, Admin and Subscriptions remain Basic when selected. Other enabled features become Basic, except Social login, Maps and AI, which are deferred. Platform, screens, complexity, rates, capacity and contingency stay the same.
Show calculation
- Development implementation = foundation + platform + screen effort + selected feature effort + common backend allowance, then × 1 complexity.
- UI/UX = (16–24 base hours + 10 screens × 3–5 hours) × 1.
- QA = 15% of low / 25% of high implementation hours.
- Delivery overhead = 10% of low / 15% of high implementation + UI/UX + QA.
- Base modeled effort = 518.65–975.775 hours; contingency = base × 10% = 51.865–97.5775 hours.
- Total effort = base + contingency = 570.515–1,073.3525 hours. Low cost = 570.515 × $50.00; high cost = 1,073.3525 × $85.00 = $28,525.75 – $91,234.96 before presentation rounding.
- Timeline = total effort / 80 productive hours/week = 7.1314–13.4169 weeks before presentation rounding.
Hosting, SaaS subscriptions, API consumption, cloud usage, app-store fees, ongoing maintenance, support, content creation, legal/compliance work, security certification, data migration, hardware, marketing, taxes and payment-processing fees are excluded. AI model usage, training, GPU infrastructure and token consumption are not modeled. Everything is calculated locally; refresh clears project scope.
How to use
See the cost, effort, timeline, and biggest drivers behind your app idea with transparent planning assumptions.
Choose one platform combination, enter 1–100 screens, set twelve feature levels and choose complexity and a pricing assumption. The four sections show the estimate immediately; every valid change updates hours, cost, timeline, breakdown, drivers and any open Lean MVP comparison. Budget, Typical and Premium are editable rate ranges. Advanced contains productive weekly delivery capacity and a separate planning contingency. No framework choice, account, email gate or Calculate button is required.
How app development cost is estimated
First model effort, then price it: low estimated cost = low total hours × low hourly rate; high estimated cost = high total hours × high hourly rate. Low/high hours are estimated separately throughout, not generated from a midpoint and an arbitrary percentage band.
Implementation hours = (base project effort + platform effort + screen effort + selected feature effort + common backend allowance) × complexity multiplier. Design = (base design + screens × design per screen) × complexity. QA = adjusted implementation × QA percentage. Delivery overhead = (implementation + design + QA) × delivery percentage. Base modeled effort = implementation + design + QA + delivery. Total effort = base modeled effort × (1 + contingency). Timeline = total effort / productive project hours per week.
These are illustrative effort/rate assumptions for early planning, not market quotes. App cost model v1.0; assumptions reviewed 2026-10-03. The range is a planning model, not a statistical confidence interval or a promise of actual effort.
Platform effort
Web is one product surface. iOS and Android each mean one native mobile surface. Native iOS + Android means two native surfaces. Cross-platform mobile means one shared mobile surface serving iOS and Android. Web + cross-platform mobile includes both web-specific and mobile-specific effort, with one common foundation and backend.
| Platform | Platform hours | Screen / feature UI factor |
|---|---|---|
| Web | 40–64 | 1× |
| iOS | 64–104 | 1× |
| Android | 64–104 | 1× |
| iOS + Android native | 112–184 | 1.8× |
| Cross-platform mobile | 80–128 | 1.1× |
| Web + Cross-platform mobile | 120–192 | 1.9× |
Common feature backend/integration hours stay single-counted. Only screen layout and feature interface work use the platform UI factor. Platform allowances cover build/release surface differences, not a duplicate backend. The model gives native iOS + Android more effort than cross-platform under equal inputs, but cross-platform is not always cheaper in actual projects: code sharing, native integration, performance needs and expertise matter.
For a separately specified web surface, explore page-speed impact for a web project under explicit load-time and conversion assumptions. The hypothetical revenue scenario does not predict native-app performance or change delivery effort and features.
Screens
A screen is a distinct functional view such as login, profile, dashboard, checkout or settings. Enter all unique product/admin views once, regardless of platform count. Screen implementation effort = 8–14 hours × screen count × platform UI factor, before complexity. Design adds 3–5 hours per unique screen separately. Implementation layout/navigation scaffolding and design are different work.
Selected features add behavior, state and integration work beyond that screen scaffolding. No feature secretly adds a second set of screens. Screen effort is linear before complexity; QA and delivery overhead also grow as effort increases. Quick presets are 5, 10, 20 and 30; manual counts up to 100 remain supported.
Feature complexity
Each feature is Off, Basic or Advanced. Off adds zero feature effort. Basic/Advanced ranges describe scope, not a universal price. Feature hours = common feature backend/integration hours + feature interface hours × platform UI factor. The common part is counted once even for multiple surfaces. Apply the global complexity multiplier afterwards.
| Feature | Basic hours · single surface | Advanced hours · single surface | Scope examples |
|---|---|---|---|
| Login / user accounts | 32–52 total Common: 20–32 Interface: 12–20 | 72–120 total Common: 48–80 Interface: 24–40 | Basic: Email sign-in, profile and standard account lifecycle. Advanced: Roles, advanced account lifecycle and organization access; excludes provider linkage. |
| Social login | 12–24 total Common: 8–16 Interface: 4–8 | 28–52 total Common: 20–36 Interface: 8–16 | Basic: One provider linked to an account system; identity layer budgeted separately. Advanced: Multiple providers and account-linking flows; identity layer budgeted separately. |
| Payments | 40–64 total Common: 24–40 Interface: 16–24 | 88–144 total Common: 56–96 Interface: 32–48 | Basic: One payment provider and standard one-time checkout. Advanced: Saved payment methods, complex one-time billing and refund flows; recurring lifecycle is Subscriptions. |
| Push notifications | 20–36 total Common: 12–24 Interface: 8–12 | 48–84 total Common: 32–56 Interface: 16–28 | Basic: One provider, basic notifications and permission flow. Advanced: Segmentation, scheduling, deep links and notification preferences. |
| Maps / location | 24–40 total Common: 8–16 Interface: 16–24 | 72–136 total Common: 32–64 Interface: 40–72 | Basic: Standard map, location permission and pins. Advanced: Routes, geofencing and complex location workflows. |
| Chat / messaging | 56–96 total Common: 32–56 Interface: 24–40 | 136–232 total Common: 88–152 Interface: 48–80 | Basic: 1:1 text messaging and a conversation view. Advanced: Real-time delivery, read states, attachments, moderation and group behavior. |
| File / photo uploads | 20–40 total Common: 12–24 Interface: 8–16 | 56–100 total Common: 36–64 Interface: 20–36 | Basic: Standard uploads, size limits and file access. Advanced: Processing, previews, permission flows and upload recovery. |
| Search & filters | 28–48 total Common: 16–28 Interface: 12–20 | 76–136 total Common: 48–88 Interface: 28–48 | Basic: Simple search over indexed fields and standard filters. Advanced: Full-text relevance, facets, saved filters and complex query state. |
| Subscriptions | 36–60 total Common: 24–40 Interface: 12–20 | 92–160 total Common: 64–112 Interface: 28–48 | Basic: Recurring plans and basic entitlements; checkout integration budgeted under Payments. Advanced: Proration, lifecycle, metered plans and advanced entitlements; excludes checkout duplication. |
| Admin dashboard | 48–80 total Common: 24–40 Interface: 24–40 | 112–192 total Common: 64–112 Interface: 48–80 | Basic: Standard records management and basic operational views. Advanced: Detailed operations, complex permissions, audit views and reporting. |
| Third-party API integration | 24–40 total Common: 20–32 Interface: 4–8 | 72–136 total Common: 56–104 Interface: 16–32 | Basic: One straightforward integration and standard error handling. Advanced: Multiple integrations, complex data flows, webhooks and recovery; excludes other selected feature integrations. |
| AI-powered feature | 36–60 total Common: 24–40 Interface: 12–20 | 112–200 total Common: 80–144 Interface: 32–56 | Basic: One third-party AI API workflow; implementation effort only. Advanced: Multiple AI workflows, retrieval/context, moderation and asynchronous processing; implementation only. |
Accounts budgets the identity layer; Social login budgets provider linkage separately. Payments budgets checkout/transaction integration; Subscriptions budgets recurring lifecycle/entitlements, not a second checkout. If either underlying layer already exists, select the scope you still need. Third-party API integration means additional integrations beyond those already selected as Payments, Maps, AI or other features. These definitions do not cover every implementation.
Simple vs Standard vs Advanced
- Simple: 0.85×. Straightforward business logic, standard UI, limited integrations.
- Standard: 1×. Custom UI, backend/database workflows, several integrations and normal production QA.
- Advanced: 1.3×. Complex business logic, real-time behavior, significant integrations and higher state/data complexity.
These are BuzCalculator planning assumptions, not industry laws. Complexity adjusts implementation and UI/UX effort; QA and delivery then scale from the adjusted effort. Advanced feature scope and global project complexity are separate choices: choose a global level reflecting the overall project rather than using it to count the same workflow twice.
Team-rate assumptions
Effort is not price. Rate selection leaves hours, architecture and scope unchanged. The low endpoint prices low modeled hours; the high endpoint prices high modeled hours. Rate assumption used is always visible next to the result.
- Budget: $25–$45/hour.
- Typical: $50–$85/hour.
- Premium: $100–$150/hour.
Illustrative rate assumptions only, not industry averages, regional stereotypes or maintained market data. Custom low/high rates must be positive, at most $1,000/hour and ordered low ≤ high. Editing either rate endpoint selects Custom. Values are in USD; no exchange-rate conversion is performed.
To examine a custom pricing assumption, calculate a rate from billable time and expenses in a separate freelance model. That planning rate does not set a contractor’s quote or change the app estimate’s scope hours.
Where the hours go
Base project effort: 40–64 hours for project setup, architecture, core navigation, environment/configuration and release preparation. It does not include a full identity or payment backend. Platform effort is additional surface-specific build/release work. Common backend/infrastructure allowance: 16–32 hours once when at least one backend feature is enabled; it covers common deployment/configuration, not another copy of feature integration work. With all features Off, that allowance is zero. Admin is a feature: Off leaves only baseline operational tooling.
UI/UX: 16–24 base hours + 3–5 per unique screen, then complexity. QA/testing: 15% of low and 25% of high implementation hours. PM/delivery: 10% of low and 15% of high implementation + design + QA hours, covering planning, coordination, reviews and delivery management.
Planning contingency is a separate 10% default, editable 0–50%, applied after base modeled effort. Base effort + contingency = total modeled effort. Exact internal component totals reconcile; presentation uses an explicit rounding-adjustment row so displayed breakdown columns also sum to the rounded hero endpoints. This is presentation rounding, not additional modeled work.
Timeline estimate
Timeline low = low total effort / weekly productive project capacity; timeline high = high total effort / that same capacity. Default capacity is 80 productive project hours/week, editable above 0 through 1,000. This is a scheduling assumption, not a headcount or hours/40 calendar-week promise. Dependencies, approvals, staffing, parallel work and waiting time can change actual calendar duration. The estimate does not promise delivery dates.
Lean MVP scenario
Show Lean MVP previews a deterministic example reduced-scope scenario; no AI generates requirements. Selected Accounts, Payments, Admin and Subscriptions stay Basic (Advanced becomes Basic). Push notifications, Chat, File uploads, Search and API integrations become Basic when enabled. Social login, Maps and AI are deferred to Off. Off features remain Off. Platform, screens, complexity, rate, capacity and contingency remain the same.
The preview lists Kept, Simplified and Deferred choices, then runs the same engine to compare cost, effort and timeline. Current scope never changes until you click Apply Lean MVP. Afterwards every feature remains editable. This is not “what you should build”: deferred features could be core to your own app. The default fixture already matches these rules, so its MVP preview has no reduction.
What changes the estimate
Drivers rank actual modeled component/individual-feature midpoint hours; Off features cannot appear. The aggregated Features row is replaced with its enabled individual features when ranking, and contingency is excluded from this ranking. Midpoints are used only to sort contributions, never to calculate the estimate endpoints. Removal previews rerun the whole model with that feature Off, including any change to common backend, QA, delivery and contingency. They do not change inputs.
Platform architecture, screen count, feature scope, complexity and pricing assumptions can all change the cost range. Vendor API fees are excluded from integration effort. AI means implementation only: no model API usage, training, GPU infrastructure, tokens or hosting. Ongoing hosting and maintenance are not automatically added.
Worked examples
Default cross-platform mobile scope
10 screens; Accounts, Payments, Push and Admin Basic; all other features Off. Standard 1× complexity; Typical $50–$85/hour; 10% contingency; 80 productive hours/week.
- Platform / foundation: 120–192 hours; $6,000.00 – $16,320.00.
- Screens: 88–154 hours; $4,400.00 – $13,090.00.
- Features: 146–241.6 hours; $7,300.00 – $20,536.00.
- UI/UX: 46–74 hours; $2,300.00 – $6,290.00.
- Backend / infrastructure: 16–32 hours; $800.00 – $2,720.00.
- QA / testing: 55.5–154.9 hours; $2,775.00 – $13,166.50.
- Project management / delivery: 47.15–127.275 hours; $2,357.50 – $10,818.38.
Base effort 518.65–975.775 hours + contingency 51.865–97.5775 = total 570.515–1,073.3525 modeled hours. Exact modeled cost before presentation rounding: $28,525.75 – $91,234.96. Headline planning display: 570–1,075 hours, $28,500 – $91,500, ≈ 7–14 weeks. Timeline before display rounding: 7.131438–13.416906 weeks.
10 screens vs 20 screens
Keep everything else unchanged. At 20 screens: 725–1,385 hours, $36,000 – $117,500. Incremental modeled effort = 158.752–306.7625 hours; incremental cost = $7,937.60 – $26,074.81. Screen count is one driver among several; implementation, design, QA, delivery and contingency all contribute.
Basic chat vs Advanced chat
On the same default project, enabling Basic chat gives 650–1,235 hours and $32,500 – $105,000. Advanced chat gives 765–1,455 hours and $38,000 – $123,500. Advanced-minus-Basic modeled difference: 114.6596–221.375 hours and $5,732.98 – $18,816.88. This is a model scenario, not a universal chat cost.
Same effort, different rate assumption
- Budget: 570–1,075 hours; $14,000 – $48,500.
- Typical: 570–1,075 hours; $28,500 – $91,500.
- Premium: 570–1,075 hours; $57,000 – $161,500.
Hours stay identical when only rates change. Effort ≠ price.
Assumptions and limitations
Hosting, SaaS subscriptions, API consumption, cloud usage, app-store fees, ongoing maintenance, support, content creation, legal/compliance work, security certification, data migration, hardware, marketing, taxes and payment-processing fees are excluded. AI usage fees, training, GPU infrastructure and token consumption are also outside this implementation estimate. Actual scope may change after discovery. This is an early-stage order-of-magnitude planning estimate, not a contract, fixed-price commitment or guaranteed budget. The low/high endpoints are separate planning inputs, not probabilities or a validated confidence band.
Definitions cannot cover every app; existing systems, migration, scale, security, accessibility depth, regulated requirements, bespoke hardware or unusual native integrations may materially change effort. Review detailed scope with the delivery team. No geographic-rate claims, universal feature prices or professional MVP recommendation are made. Everything is local in memory, with no persistent project data, URL state, account, email gate, network calculation or scope analytics payload. Refresh clears entries.
For an excluded ongoing-capacity question, estimate operating bandwidth separately using explicit traffic and payload assumptions. Bandwidth capacity is not implementation labor, a hosting-price quote or a complete infrastructure budget.
FAQ
How is app development cost estimated?
Estimate low and high hours separately from foundation, platform, screens, selected features and common backend. Apply complexity, UI/UX, QA and delivery assumptions, then add contingency. Multiply low hours by low rate and high hours by high rate.
Why does the calculator estimate hours before cost?
Hours describe modeled effort; rates describe pricing. Keeping them separate lets you compare scope changes without assuming a universal fixed price for a feature. Rate changes leave modeled hours unchanged.
How does platform choice affect cost?
Each supported combination has a documented platform effort allowance and UI adaptation factor. Cross-platform is one shared mobile codebase; native iOS + Android represents two native surfaces. Common foundation and feature backend work are not duplicated.
How much does each additional screen add?
Before complexity and platform adaptation, each distinct functional view adds 8–14 implementation hours and 3–5 design hours under this model. QA, delivery overhead and contingency also scale. These are illustrative planning assumptions, not universal screen prices.
What is the difference between Basic and Advanced features?
Basic means a limited implementation described beside the control. Advanced adds specific workflows and integration/state complexity. Advanced always has greater modeled feature hours; Off contributes zero feature hours. Definitions are examples, not complete requirements.
How does project complexity affect the estimate?
Simple uses 0.85×, Standard 1.00× and Advanced 1.30× on implementation and design. QA and delivery percentages apply to those adjusted hours. These editable scope selections use documented BuzCalculator planning assumptions.
What does the team-rate assumption mean?
Budget, Typical and Premium select illustrative hourly ranges of $25–$45, $50–$85 and $100–$150. You can edit either endpoint as Custom. These are neutral planning scenarios, not geographic rates or market averages.
How is the development timeline estimated?
Divide total modeled hours by effective productive project capacity per week; the default is 80 hours/week and is editable under Advanced. Calendar duration depends on dependencies, approvals, staffing, parallel work and waiting time. No delivery date is promised.
What does “Lean MVP” mean in this calculator?
It is a deterministic reduced-scope example. Selected Accounts, Payments, Admin and Subscriptions are retained at Basic; other enabled features simplify to Basic except Social login, Maps and AI, which defer to Off. Preview does not change scope. Apply Lean MVP changes feature levels only after you click.
Why might an actual software quote differ from this estimate?
Detailed discovery may change scope, constraints, architecture, integrations, security requirements and team economics. This early-stage modeled planning range excludes ongoing and other stated costs; it is not a vendor price commitment or a personalized scope recommendation.
Sources / methodology
These are illustrative effort/rate assumptions for early planning, not market quotes. Model v1.0, reviewed 2026-10-03. All numeric assumptions above are internally documented BuzCalculator planning choices: platform hours/UI factors, common and interface feature hours, screen/design hours, complexity, QA, delivery, rate presets, contingency and capacity. No external study validates these exact ranges or outputs.
The GAO guide is a reference for general estimating concepts—scope, work breakdown, assumptions and documenting estimates. It supplies none of this calculator’s app feature hours, hourly rates or multipliers and does not endorse BuzCalculator.
For the site-wide policy on formulas, rounding and source review, see Calculator Methodology & Sources.