Full disclosure: we're Ryz Labs, and we're on this list. So yes, we're biased. Here's what we'd actually tell a friend, including when you should hire someone else.
If you need a new app designed and built from nothing, a product agency with strong design is usually the right buy, and that isn't us. If you already have an app and a team, and you need more senior iOS, Android or React Native engineers working your backlog on US hours, that's where we fit. The question that decides it: do you need a product designed, or engineering capacity for a product you already have?
Mobile has constraints web teams don't. You ship through App Store and Google Play review, so a bad release can't be rolled back in minutes. You support old OS versions and many devices. Offline behavior, push notifications, deep links, background tasks and battery use all need specific skill. And the first choice, native Swift and Kotlin versus React Native or Flutter, shapes hiring for years. Our Flutter vs React Native guide covers that trade-off.
The other difference is that an app is never done. After launch come OS updates every year, new device sizes, store policy changes and crash reports. Ask every vendor what happens in year two, and who will be on call when a release breaks sign-in.
Fueled is a New York firm doing mobile app development for iOS and iPadOS, web and enterprise CMS (through its 10up practice), and AI and ML features. It says its apps have won "App of the Year" recognition.
Where it fits: a high-visibility launch where design is the differentiator. The catch: an agency build means planning for who maintains the app afterward.
WillowTree, a digital partner since 2008, is now part of TELUS Digital. It offers web and mobile app development, experience design, and data and AI work, and says it serves 600+ clients with an NPS of 70+.
Where it fits: large brands that want mobile, design and customer experience from one partner. The catch: confirm which team and location will work on your app after the rebrand.
Netguru has 400+ people and says it has delivered 2,500+ projects over 17+ years. It builds iOS, Android, React Native, Flutter and Kotlin Multiplatform apps, plus web, AI and product design.
Where it fits: European companies, or US teams comfortable with morning-only overlap. The catch: plan around the time difference for reviews.
thoughtbot does mobile, Ruby on Rails, design, product management, MVPs and team augmentation, and positions itself for "high-stakes and regulated environments."
Where it fits: early products that need design and engineering together. The catch: ask which time zones your team will cover.
We're trusted by Fortune 500 engineering teams, and our mobile app development work is mostly the third job above: senior Latin American engineers who join your team, your standups and your repos. You can add iOS developers, Android developers or React Native developers, plus backend and product design people. Only the top 1% of the tens of thousands of engineers we've interviewed make it, and real-time overlap with US teams means same-day code review. A dedicated team or outsourced build is also available for a scoped app.
Rates are public: mid-level engineers at $7,000 to $10,000 a month and seniors at $10,000 to $15,000. You get a plan, a price and the names of the people before you start. See iOS developer rates.
Where we're not the right fit: if you need brand, research and product design to define a new app, Fueled, TELUS Digital or thoughtbot lead with that and we don't. If you want short hourly gigs from a freelance marketplace, we're not that either.
BairesDev builds in Swift, Kotlin, React Native and Flutter, and offers staff augmentation, dedicated teams and outsourcing. It claims 1,480+ projects delivered. See Ryz Labs vs BairesDev.
Where it fits: one vendor for mobile and backend. The catch: ask to meet the mobile engineers specifically.
Intellectsoft offers mobile app development, custom software, UI/UX design and dedicated teams across fintech, healthcare, logistics and construction.
Where it fits: enterprise apps where a local office matters. The catch: ask which region your team comes from.
If you need a new app designed and launched: Fueled or thoughtbot for product and design, TELUS Digital for enterprise scale.
If you're in Europe or fine with partial overlap: Netguru.
If you already have an app and need senior mobile engineers on US hours: Ryz Labs. Your leads direct the work, and you can scale the team as the roadmap grows.
If you want one vendor for mobile and backend: BairesDev. For broader options, see software development companies.
Agencies rarely publish prices. For a team, multiply size by months by monthly rate: two senior mobile engineers and one backend engineer at $12,000 a month for five months is $180,000. Design is extra if you need it.
Cross-platform (React Native, Flutter) suits most business apps and saves a codebase. Native suits apps that lean hard on device features or performance. See iOS and Android development.
If you don't have a product team yet, an agency. If you do, adding engineers keeps knowledge in-house.
You. Store accounts, signing keys and code should be in your company's name from day one.
We checked pricing and services for every provider here in October 2026. This changes often, so double-check before you sign anything.
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