How Do I Know if an App Developer Is Good?
The signals that actually reveal a good app developer, the questions that expose skill, and how to judge one before you commit.
Short answer
The clearest sign of a good app developer is real apps they have shipped to the App Store that you can download and use, and that feel fast, native, and considered. Beyond that, look at the ratings and reviews of those apps, how clearly and promptly they communicate, and whether they let you own your code. Promises and decks are easy; shipped, well-reviewed, maintained apps are the real proof. For the wider process this fits into, see our guide on how to hire an iOS app developer.
The strongest signal: apps you can actually use
Everything else is secondary to this one test: a good app developer has good apps you can download and use right now. Not mockups, not screenshots in a deck, not descriptions of projects under NDA, but live apps on the App Store that you can install and try yourself. This is the single most reliable signal, because it is the hardest to fake. Anyone can describe great work; only someone who does great work can point you to it running on your own phone.
When you use their apps, pay attention to how they feel. Do they open fast and respond instantly, or lag and stutter? Do they follow the conventions of the iPhone, the gestures and navigation you expect without thinking, or feel awkward and foreign? Is the design considered and clean, in the spirit of Apple’s Human Interface Guidelines, or thrown together? You do not need to be technical to notice these things; a good app simply feels good to use, and that feeling is exactly what you are hiring the developer to reproduce for you. If their existing apps feel rough, assume yours would too.
What ratings and reviews reveal
Once you have found a developer’s shipped apps, the App Store gives you a second signal for free: the ratings and reviews those apps have earned from real users. A developer can tell you their work is excellent; thousands of users voting with stars and words is far harder to spin.
Look at more than the average score. Read a handful of reviews to see what real people say about the experience, whether the app is reliable, whether it feels well made, whether problems get fixed. A pattern of solid ratings across several apps is strong evidence that the developer ships quality that holds up in real use, not just in a demo. Consistently poor reviews, or apps that were shipped and then clearly abandoned, tell you the opposite. This is public, honest evidence that costs you nothing to check, and it is one of the most useful things you can do before committing to anyone.
Communication is itself a signal
Skill matters, but how a developer communicates during your first conversations predicts the whole project, and it is a signal too many people ignore. A good developer is clear, prompt, and honest, including about the things they are not. They explain choices in plain language, they are upfront about what they do and do not do well, and they are comfortable discussing scope, cost, and what happens after launch.
The opposite behaviours are warning signs precisely because they rarely improve. A developer who is slow to reply, vague about process, evasive about who will own the code, or who promises everything cheap and fast, is showing you how the project will go. Building an app is a relationship that runs for months, and the way someone communicates before you have paid them is the best preview you will get of the way they will communicate when something goes wrong. Trust that preview.
Green flags and red flags
| Green flags | Red flags |
|---|---|
| Live apps you can download and use | Only mockups or NDA excuses |
| Solid ratings and reviews on their apps | Poor reviews or abandoned apps |
| Clear, prompt, honest communication | Slow, vague, or evasive replies |
| Happy to let you own code and account | Reluctant to discuss ownership |
| Honest about what they do not do | Promises everything, cheap and fast |
The table sorts the signals into the ones that reassure and the ones that should give you pause. No single row is decisive on its own, but the pattern is. A developer who shows green across the board, real apps, good reviews, clear communication, and a willingness to hand you ownership, is very likely a safe choice. One showing several red flags is a risk no matter how attractive the price, because those flags predict exactly the outcomes people fear: a stalled project, a poor app, or losing control of their own product.
The questions that expose skill
A few direct questions quickly separate a good developer from a risky one, and how they answer matters as much as what they say.
- Can I see your live apps, and why did you make certain choices? Tests both their work and their thinking.
- Who does the design, backend, and testing? A finished app needs all of these, and one coder rarely covers them, ideally building natively in Swift.
- Who will own the code and the App Store account? The right answer is you, and a good developer says so without hesitation.
- What happens after launch? A developer who thinks past delivery day, through Apple’s App Store Review Guidelines and into maintenance, is one who builds to last.
A good developer welcomes these questions and answers them plainly, because they have done this before and have nothing to hide. Evasion, defensiveness, or pressure to skip the questions and just sign are themselves the answer, and it is not the one you want.
Signals to weigh together
| Signal | How much to trust it | Why |
|---|---|---|
| Live apps you can use | Highest | Direct, hard to fake |
| App Store ratings and reviews | High | Real users, public evidence |
| Communication in early talks | High | Predicts the whole project |
| References from past clients | Useful | Adds context, can be cherry-picked |
| Portfolio pages and decks | Lowest | Easy to make look good |
No single signal is perfect, so the skill is weighing them together. Put the most trust in the things that are hardest to fake, live apps and public reviews, and use references and communication to fill in the picture. Give the least weight to polished portfolio pages, which are the easiest thing in the world to make look impressive. When several strong signals point the same way, you can be confident; when they conflict, dig further before you commit.
Why a portfolio is the weakest evidence
It is worth saying plainly, because so many buyers get this backwards: a polished portfolio page is the least reliable thing a developer can show you. A portfolio is marketing, curated and controlled by the person selling to you, and it can show beautiful screens of apps that were never finished, never shipped, or built mostly by someone else. None of that is visible from the images on a website.
The reason live apps beat a portfolio is that shipping is the hard part. Plenty of developers can produce attractive mockups; far fewer can take an app all the way to a polished, working product on the App Store that real people use and rate well. When you insist on downloading a real app rather than admiring a portfolio, you are testing for exactly the ability that matters, the ability to finish, which is where most weak developers fall down. So when a developer points you to their portfolio, the right response is to ask which of those are live on the App Store right now, and to go use those instead. If the honest answer is that few or none shipped, that gap between the portfolio and the store is itself the most useful thing you have learned. A developer proud of shipped work leads with it; one who leads with mockups may be hiding that the shipping never happened.
When you cannot fully judge
Be honest about the limits of what you can assess, especially if you are not technical or the developer is new and has little public work. Sometimes you simply cannot be certain from the outside, and pretending otherwise is its own risk. In those cases, two moves protect you. Ask for references from past clients and actually speak to them, since a real client will tell you things a portfolio will not. And start small: give the developer a limited, well-defined piece of work first, and judge them on the real result before committing the whole app. A good developer is happy to be tested this way; one who resists is telling you something.
Ultimately, the best protection is choosing a partner whose work you can see, whose communication you trust, and who lets you own what you pay for. A team that designs and builds under one roof, as we do, gives you live apps to judge, clear communication from the first conversation, and ownership of your code and Apple Developer Program account. See examples in our work and judge for yourself at a short call.
FAQ
How do I know if an app developer is good?
The clearest sign is real apps they have shipped to the App Store that you can download and use. If those apps feel fast, native, and considered, and have solid ratings and reviews, that is strong evidence. Add clear, prompt communication and a willingness to let you own your code, and you have a good developer. Promises and portfolios are easy to fake; live, well-reviewed apps are the proof that counts.
What should I look for in a developer's past apps?
Download and use them. Notice whether they feel fast and smooth or laggy, whether they follow iPhone conventions or feel foreign, and whether the design is considered. Then check the App Store ratings and read a few reviews to see how real users find them. An app that feels good and is well reviewed shows the developer can finish and ship quality, which is exactly what you are hiring them for.
What questions reveal whether a developer is good?
Ask to see their live apps and why they made certain choices; ask who does the design, backend, and testing; ask who will own the code and App Store account; and ask what happens after launch. A good developer answers these clearly and honestly, including about the parts they are not. Vague answers, or reluctance to discuss ownership and maintenance, are signs to be careful.
Are online reviews of a developer reliable?
Reviews of a developer help, but the ratings and reviews of the apps they have actually shipped are more reliable, because they reflect real users experiencing the work. Combine both with references from past clients if you can. No single source is perfect, so weigh the evidence together, and treat live, well-reviewed apps as the strongest signal available.
How can I judge a developer if I am not technical?
You do not need to read code. Use their shipped apps and trust your experience of them, since a good app feels good to use even to a non-technical person. Check ratings and reviews, judge how clearly they communicate, and insist on owning your code. If you are unsure, start with a small, well-defined piece of work before committing to the whole app, so you can judge them on real results.