App DevelopmentBest Mobile App Development Companies in 2026

The best mobile app development company depends on your budget and how much help you want. App369 and SolGuruz publish the lowest starting prices. nomtek and Ptolemay show well-known consumer apps built in Flutter. Cleveroad offers a large team and the most Clutch reviews here (82). All five build one app that runs on both iPhone and Android. To see how features change the price before you call anyone, try the free app cost calculator. App369 publishes this guide and is one of the options. It is based on public information, not an independent benchmark.

What a mobile app development company is (and isn't)

A mobile app development company designs, builds and launches apps for iPhone and Android: the screens, sign-in, the database behind the app, payments and the App Store and Google Play listings. This guide covers companies that build one app for both platforms from a single codebase, in Flutter or React Native. That can cost less than building two separate native apps, depending on the app. For iPhone-only or Android-only apps, see the iOS and Android guides. For what App369 builds, see the mobile app development service page.

How I compared these mobile app companies

I checked each company's own website on October 22, 2026, and its Clutch profile on October 15, 2026:

• Published price: a starting price, minimum or cost band on the company's own site.
• Published timeline: how long the company says a first version takes.
• Clutch data: minimum project, hourly rate, rating and review count, read the same day.
• Cross-platform stack: whether the company names Flutter or React Native.
• Proof of work: named clients, case studies or apps in the stores.

I didn't hire these companies or test their apps. Companies are listed alphabetically. The order is not a ranking.

The best mobile app development companies in 2026

1. App369, best for a first iPhone and Android app at a fixed price

App369 publishes this guide. It is one developer, Simon Dziak, in Miami, Florida. It builds mobile apps in Flutter, so one codebase runs on iPhone and Android, with Firebase or a Node.js backend on Google Cloud. Mobile apps start from $9,000, and the instant quote gives a price range for your features in about a minute before a written fixed quote. Its own product, Workspace369, is a Flutter and Firebase app, described in the Workspace369 case study. App369 has no Clutch profile; its Fiverr profile shows a 5.0 rating from 126 reviews (read October 13, 2026).

• Strengths: a published starting price for a two-platform app; you work directly with the developer; a fixed written quote before you commit.
• Limitation: one developer, so it can't run a large build or several workstreams at once.
• Best for: founders and small businesses who want a first app on both stores without an agency budget.

2. Cleveroad, best for businesses that want a large team with a long review record

Cleveroad's site lists offices in Tallinn, Estonia, Claymont, Delaware, and Oslo, Norway. It builds native iOS and Android apps as well as Flutter and React Native apps. Its own cost guide puts a simple app for one platform at $40,000–$120,000 over 2–3 months and a medium app at $120,000–$200,000 over 3–6 months. On Clutch it lists a $10,000+ minimum project and $25–$49 per hour, with a 4.9 rating from 82 reviews and 250–999 employees (read October 15, 2026).

• Strengths: the most Clutch reviews here; low hourly rates; published cost bands by complexity.
• Limitation: its cost bands are quoted for one platform and sit far above its $10,000+ Clutch minimum, so ask for a two-platform quote.
• Best for: businesses that want a large vendor with a long public review record.

3. nomtek, best for funded startups that want Flutter with big-brand references

nomtek lists its address in Wrocław, Poland, on its own site. It builds native and multi-platform apps, with Flutter, FlutterFlow and augmented reality work named on its site. Its home page names projects for Randstad, where it reports active users up 57% from 2023 to 2024, Siemens Healthineers, Slyyd and Vogue Singapore. Its pricing page describes fixed-price, time-and-materials and dedicated-team models with no dollar figures. On Clutch it lists a $25,000+ minimum project and $50–$99 per hour, with a 4.9 rating from 43 reviews (read October 15, 2026).

• Strengths: well-known named clients; a Flutter specialty; a fixed-price option.
• Limitation: no published price, and a Poland base means less overlap with US working hours.
• Best for: funded startups and larger companies that want a Flutter team with enterprise references.

4. Ptolemay, best for consumer apps built in Flutter with a US contact

Ptolemay shows its address at 340 S Lemon Avenue in Walnut, California, on its site. It builds Flutter apps and says it puts 2–3 senior engineers on each project. Its home page features consumer apps including Sézane, a fashion app, Diagnio, a fertility tracker, and Ranny, a rentals marketplace, with their store ratings. On its own blog it lists itself as "starting at $10,000, $50/hr". On Clutch it lists a $25,000+ minimum project and $50–$99 per hour, with a 5.0 rating from 17 reviews (read October 15, 2026).

• Strengths: real consumer apps with large rating counts; a US address; small senior teams.
• Limitation: its $10,000 start, from a ranking it wrote itself, conflicts with its $25,000+ Clutch minimum.
• Best for: consumer, e-commerce and health startups that want Flutter and a US point of contact.

5. SolGuruz, best for small budgets that want a published rate and minimum

SolGuruz says on its site that it is headquartered in Ahmedabad, India, with 90+ people. It builds mobile apps in Flutter, React Native and native code, plus web and AI work. Its home page FAQ publishes the most complete price set here: $18–$50 per hour, a $5,000 minimum project, and about 8–12 weeks from contract to App Store submission, with fixed-price, hourly and dedicated-team options. Its featured case study is a hospitality maintenance platform delivered in 45 days. I couldn't read its Clutch profile on October 15, 2026, so this guide has no Clutch figures for it.

• Strengths: a published hourly rate, minimum and timeline; the lowest published minimum here; a fixed-price option.
• Limitation: no US office found on its site, and no Clutch figures I could check.
• Best for: small budgets that want an offshore team with clear rates up front.

Side-by-side comparison

Which mobile app company fits your situation

How to choose a mobile app development company

1. Decide on one codebase or two. One Flutter or React Native app can cost less than separate iPhone and Android apps, depending on the app. The native vs cross-platform comparison shows when native is worth it.
2. Ask for store links. Ask for App Store and Google Play links to apps the company built and still maintains.
3. Compare written quotes for the same scope. The app development RFP guide helps you describe it once for every firm.
4. Check minimums in writing. Several firms above list different minimums on their site and on Clutch.
5. Own everything after launch. The mobile app handoff checklist lists the code, accounts and store listings you should receive.

Get a price for your mobile app

The instant quote for a mobile app gives a price range for your features in about a minute. If you'd rather describe the app in your own words, use the contact form and you'll get a written reply. Compare it with a quote from at least one other company on this list.