Total app build cost from team hours, rates, and platform complexity

Why App Budgets Balloon Past Initial Estimates

Most app quotes come from developers estimating only development hours. Actual cost covers four roles: development, design, quality assurance, and project management. Skip any of the four and the missing work shows up later as scope creep, bug-fix rounds, or a project that nobody owns. Realistic splits for a production app: 60% development, 15% design, 15% QA and testing, 10% project management. The calculator takes each role separately so you see where the money actually goes, then adds a 15% contingency because every non-trivial project runs over something.

Realistic Hourly Rates by Role and Region

Developer rates: 50-80/hour (Eastern Europe), 80-130/hour, 130-200/hour (Coastal cities), 200-350/hour (specialised fintech, healthtech, or senior consultants). Designer rates: typically 70-90% of equivalent developer rate. QA rates: usually 60-70% of developer rate. Project manager rates: 80-110% of developer rate, sometimes replaced by a fractional CTO or product consultant at 150-200% of developer rate.

The Platform Multiplier

Cross-platform (React Native, Flutter): baseline. Single native platform (iOS only or Android only): 0.8-0.9x baseline. Both native platforms separately: 1.6-1.8x baseline. Web + mobile app: 1.5-1.8x. The calculator's platform_multiplier input captures this as a single scalar. Use 1.0 for web-only or cross-platform. Use 1.7 for separate iOS + Android native apps. Use 1.5 for web plus a simpler cross-platform mobile app.

What Drives the Hour Count

A minimal CRUD app (login, profile, a few lists, basic API): 300-600 total hours. A typical SaaS MVP (auth, subscriptions, real-time updates, payments, email, 3-4 core features): 1,200-2,500 hours. A marketplace or two-sided platform (vendor onboarding, search, matching, reviews, messaging, payments in two directions): 3,000-6,000 hours. A consumer social app with complex features: 4,000-8,000 hours. These are development hours only — add design, QA, and PM on top.

Worked Example

SaaS MVP with web + iOS. Developer hours: 1,800 at 120/hour = 216,000. Designer hours: 300 at 95/hour = 28,500. QA hours: 240 at 75/hour = 18,000. PM hours: 200 at 130/hour = 26,000. Subtotal: 288,500. Platform multiplier: 1.4 (web + cross-platform mobile) = 403,900. 15% contingency: 60,585. Total budgeted: 464,485. That is the realistic number to present to a board or investor, not the 216,000 number a developer might quote for their part alone.

Ongoing Costs This Calculator Does Not Include

Once launched, apps have recurring costs: hosting and infrastructure (500-10,000+/month depending on scale), third-party service subscriptions (Stripe for payments at 2.9% + 0.30, Twilio, SendGrid, monitoring tools), app store fees (Apple 99/year, Google Play 25 one-time, Apple takes 15-30% of in-app purchases), ongoing development for new features and maintenance (typically 20-30% of initial build cost per year). The calculator models initial build only. Budget 1.5-2x the initial build cost for the first 3 years of total ownership.

How to Quote Versus How to Budget

An agency quote of 300,000 for a 1,500-hour project at 200/hour blended rate is different from the 460,000+ realistic total budget. Agencies often quote their team hours only, leaving QA, PM, and platform multipliers to either be absorbed in their estimate or added later as change orders. When reading a vendor quote, ask explicitly: is this quote all-in for all four roles? Does it include contingency? Does it cover both platforms if mobile is native? Gaps in these answers are where budget overruns come from six months into the project.