Fixed-Price App Development Prices 2026
What sellers publish for five kinds of fixed-price app work, from marketplace listings and agency pricing pages. App369 sells all five, so its own prices are in each table and labelled as ours.
Every figure below links to its source and was checked against that source on October 25, 2026. Where a number comes from a study a company paid for, the source says so.
Fixing One Bug
We include every published price we could read on the seller’s live page, the low ones too. Pages we could not read, including many marketplace gigs, are left out. The lowest listing prices the smallest case: its $20 covers one focused, reproducible bug, and related issues are scoped separately.
| Metric | Value | Source |
|---|---|---|
| One focused, reproducible Flutter bug (marketplace listing) | Starting at $20, 1 day | Contra listing, "Flutter Bug Fix & Mobile App Repair" |
| One reproducible bug in an existing mobile or web app, App369 App Fix Ticket | $450 Diagnosis in 3 business days, credited toward the fix; $1,200 Fix in 5 business days | App369 (our own price, from the offer page) |
Stripe Subscriptions
The two figures below are published estimates, not fixed-price packages. They differ more than tenfold because the scope does: subscription billing with webhooks versus production B2B billing.
| Metric | Value | Source |
|---|---|---|
| Subscription billing with webhooks, a vendor's published estimate (May 8, 2026) | $2,000 to $4,500, 2 to 3 weeks | Cadence, "Cost to integrate Stripe" |
| Production-grade B2B subscription billing, an agency's published estimate (priced at $150 an hour) | $25,000-$50,000 | TechConcepts, "Stripe payment integration cost" |
| Stripe subscriptions set up or fixed in your codebase (up to 3 plans, Checkout, webhooks, customer portal), App369 Stripe Billing Fix and Setup | $950, 5 business days from repo access and a test-mode key | App369 (our own price, from the offer page) |
Firebase Security Rules Audit
The one Firestore-specific listing we could read is broader than a rules audit: it bundles auth, payments and secrets checks with critical fixes. A broader security check for AI-built apps, listed at $300, is under AI-built apps below.
| Metric | Value | Source |
|---|---|---|
| Release audit covering Firestore rules, auth, payments and secrets, with critical fixes (marketplace listing) | Starting at $750, fixed price, 3-7 days | Contra listing, "AI App Rescue & Release Audit" |
| Firestore and Storage rules audit with an emulator test suite and a fix pull request, App369 Firebase Security Rules Audit | $950, 5 business days | App369 (our own price, from the offer page) |
Fixing an AI-Built App
Productized fixes for Lovable apps start at $100 each, while developers who price a full rescue start at $750 for an audit and go up to $12,000 for stabilization.
| Metric | Value | Source |
|---|---|---|
| Fixes for Lovable apps (productized service) | $100 diagnosis (credited to the fix); $100 one fix; $300 complex fix; $300 security check, including row-level security and exposed keys; $1,000 stabilizing a shaky app | aibrify, Lovable fixes |
| Rescuing a Lovable app, a developer's published estimate by scope | Audit $750–$1,500; critical fixes $2,500–$5,000; stabilization $6,000–$12,000 | rohitraj.tech, "When the AI builder breaks" |
| Apps built with Lovable, Bolt, Cursor and similar tools, App369 AI-Built App Rescue | $450 Launch Check in 3 business days; Rescue Sprint $1,950, or $1,500 after the credit, 7 business days after you accept its quote | App369 (our own price, from the offer page) |
Web App MVP
Published MVP prices run from $3,000 for the simplest kinds, such as a landing-page MVP, to $40,000 and more, for scopes that sound alike. Compare what each price covers before the number.
| Metric | Value | Source |
|---|---|---|
| Fixed-price MVP tiers (agency pricing page) | Validate $3,999; Launch $7,499; Scale from $14,999 | HouseofMVPs, pricing |
| Web MVP, an agency's published estimate | Starts at $4,500; SaaS MVP with auth, billing and admin $8,000-25,000 | MacroCoderz, "MVP development cost and timeline" |
| Web app with up to 5 core features, accounts, admin and up to 3 integrations (marketplace listing) | $9,500 fixed, 3 weeks | Contra listing, "MVP in 3 weeks, fixed $9,500" |
| Fixed-price MVP, a Miami agency's pricing page | $13K–$16K for a focused MVP, up to $22K–$25K | RapidDev, app development in Miami |
| Fixed-price MVP projects (agency pricing page) | $15,000–$40,000, 6–12 weeks | Connor on the Web, app pricing |
| MVP, an agency's published estimate by MVP type | $3,000–$10,000 for the simplest types, from $30,000 for a coded single-feature MVP | Empat, "MVP development cost" |
| First version of a web app, App369 Web App MVP Sprint | $450 written scoping in 3 business days; build from $6,000, about 4 weeks from the signed quote | App369 (our own price, from the offer page) |
Frequently Asked Questions
How much does a Firebase security rules audit cost?
On October 25, 2026, the one Firestore-specific published price we could read was a Contra release audit that covers Firestore rules, auth, payments and secrets, starting at $750 for 3-7 days. App369's Firebase Security Rules Audit is $950 for 5 business days.
How much does it cost to fix one bug in a Flutter app?
The lowest listing we could read starts at $20 for one focused, reproducible bug, with related issues scoped separately. App369's App Fix Ticket is a $450 Diagnosis in 3 business days, credited toward the fix, and a $1,200 Fix in 5 business days.
What does a fixed-price web app MVP cost?
The published prices we could read ran from $3,000 for the simplest kinds to $40,000 and more. One listing offers up to 5 core features for $9,500 in 3 weeks. App369's build starts from $6,000 after a $450 written scoping.
Why are published prices so far apart?
Scope. The lowest listings price the smallest case and quote anything more separately, while agency estimates price a full production build. Compare what each price covers, not the headline number.
Planning an App?
Get a ballpark from our app cost calculator, compare frameworks in the Flutter vs React Native guide, or send us a brief. We reply by email, usually within one business day.