How this calculator works

Most app cost calculators are a lookup table wearing a form: pick a size, get a band. This one builds an estimate the way a delivery team builds a plan — by accumulating engineering hours into disciplines, adjusting the ones your answers genuinely affect, and only converting to money at the end.

That matters because it means the output can explain itself. When the number moves, the results page can tell you which bucket of hours moved and why, rather than announcing that your app is now in a more expensive band.

• Product planning — 6% of design plus all engineering. Discovery and scoping grow with surface area, not with ambition.
• QA — 15% of everything testable: the apps, the backend, infrastructure, integrations and security work. Design hours are excluded, because a mockup is reviewed rather than tested.
• DevOps — 11% of backend and infrastructure only. Pipelines, environments and release automation track what is being deployed, and a mobile binary is not most of that.
• Project management — 11% of everything above, including the other three. Coordination is levied on the whole team, which is why it is applied last.

• A quote with no QA line — testing has been folded into development hours, or moved to you. Ask who writes the test plan, who runs device-matrix testing, and who signs off a release. If the answer is “the developers, as they go”, the 15% is still owed; it is just unpriced.
• No DevOps line — someone still has to build the pipeline, stand up staging and production, manage certificates and signing, and handle store submission. Cutting it does not remove the work, it removes the automation, and the cost comes back monthly as manual releases.
• No planning or discovery line — the scope in the quote is the scope you described, priced as though it were fully specified. Every gap in it becomes a change request at a change-request rate.
• No project management line — often the most honest of the four to question. If it is genuinely absent, ask who runs standups, who chases the blocked API key, and who tells you when a date has slipped. Someone bills that time.
• A total that is a round number — a real bottom-up plan rarely lands on $150,000. Round totals are usually a target price working backwards into a scope, which is fine, provided you know that is what you are reading.

The feature library holds 104 capabilities, each with an hour figure for what it costs as the next substantial thing you build. Two assumptions are baked into every one: that you use the obvious managed service where one exists, and that you are adding the feature to an app that already has a navigation shell, an API client and a design system.

Adding thirty of those figures together would still overstate the total, because the thirtieth feature reuses conventions the second one had to invent. So the engine discounts feature hours by rank — largest first, so the discount lands on the long tail rather than on the one big feature that defines your product, with a floor so nothing is ever treated as free.

Without that curve, bottom-up estimates come out two to three times too high. It is the single most common reason a spreadsheet estimate and a real quote disagree.

The market rate is the band you see quoted. It spans a junior contractor at one end and a principal engineer at the other, so it is roughly 1.8× wide on its own. A single team does not bill at both ends of it simultaneously — a mixed group of designers, developers, QA and PM lands somewhere in the middle — so the estimate is costed from the narrower blended rate.

low = hours × 0.90 × blend_low  ·  high = hours × 1.12 × blend_high

That produces a range about 1.6× wide. It is not decoration: it is the honest spread between a well-specified project and one that discovers its requirements late.

This site prices US teams only. There is no offshore option, no currency selector and no blended-geography fudge, because mixing a $30/hour team into a “US app cost” is how published figures end up three times apart from each other.

If you are considering an offshore or nearshore team, the honest way to use this calculator is to take the hour figure — which is a property of the work rather than of who does it — and apply your own rate to it. The hours are on every result page for exactly that reason.

• Cloud infrastructure — Estimated separately as a monthly figure on every result.
• Third-party service fees — Stripe, Twilio, Maps, Datadog and the rest — also estimated separately.
• App store fees — Apple and Google take 15–30% of in-app revenue, and $99/$25 a year for developer accounts.
• Content production — Video, imagery, copy, catalogue data and anything else that fills the app.
• Marketing and user acquisition — Routinely larger than the build for a consumer app.
• Legal and regulatory counsel — Terms, privacy, licensing, and anything a lawyer has to sign.
• Audit and certification fees — A SOC 2 audit alone is $15,000–$45,000 on top of the engineering work.
• Hardware — Test devices, and anything physical the product depends on.

Reference apps are starting templates describing the shape of a product — its typical features, architecture and scale. They are not descriptions of the named company’s proprietary technology, real infrastructure or real development cost, none of which are public. No affiliation or endorsement is implied, and all trademarks belong to their owners.

What a template does give you is a well-considered starting point: the features a product of that shape needs, a stack that would serve it, and a year-one scale a US team would sensibly plan for. Every one of those values is a control in the wizard. Nothing a template sets is locked.

Mobile App Development Cost Calculator is published by Taction Software Solutions (Taction Software LLC), a software engineering company that builds mobile applications, backends and cloud infrastructure for US clients.

The calculator is free, requires no account, and shows you your full result before it asks you for anything. We build the kind of software it prices, so there is an obvious commercial interest here — which is the reason every assumption is published rather than hidden. Estimates you can argue with.