Anyone can call themselves a "mobile app developer." A laptop, an internet connection, and a YouTube tutorial is all it takes to set up shop. So how do you separate the real professionals from the chancers — before you hand over your budget?
After years of building mobile apps for South African businesses, we've seen the difference between a genuine developer and someone who's in over their head. Here's exactly how to evaluate experience before you hire.
1. Ask to See Their Previous Apps — Live, Not Just Screenshots
This is the single most important step. A legitimate developer should be able to show you apps they've built that are currently live in the App Store and Google Play Store. Not mockups. Not "projects they worked on as part of a team." Actual, published apps you can download and use yourself.
When reviewing their portfolio, ask yourself:
- Do the apps feel polished and professional?
- Are they actively maintained? (Check the "Last Updated" date on the app store listing)
- Do they have genuine user reviews — not just 5-star ratings from obvious fake accounts?
- Are the apps relevant to what you need? (An e-commerce app is very different from a booking app)
Red flag: The developer can only show you screenshots or Figma files. Anyone can design a pretty screen. Building a functional, published app is a different skill entirely.
2. Check Their App Store & Google Play Presence
Go beyond the portfolio they send you. Search for the developer or agency name in the App Store and Google Play. A developer with real experience will have a developer account with published apps under their name — not just client apps they "contributed to."
Look for:
- A consistent developer/agency name across multiple published apps
- Apps that have been updated recently (within the last 6 months)
- Apps that support current OS versions (iOS 19+ and Android 15+ as of 2026)
- Reasonable star ratings and genuine-looking reviews
3. Ask Technical Questions — Even If You're Not Technical
You don't need to be a developer to ask questions that reveal whether someone knows what they're talking about. Here are a few questions that separate experienced developers from beginners:
- "What tech stack do you use and why?" — A good developer can explain their technology choices in plain language. At GSDM, we use React Native because it lets us build for both iOS and Android from one codebase, saving clients time and money. But we can also explain when native development (Swift/Kotlin) might be necessary.
- "How do you handle offline functionality?" — In South Africa, connectivity isn't always reliable. An experienced local developer will have a clear answer about offline data storage, sync strategies, and handling poor network conditions.
- "How do you manage App Store rejection?" — Every developer has had an app rejected. An experienced one will tell you why it happens, how they handle it, and give you a real example of navigating Apple's review process.
- "What's your testing process?" — If the answer is "we test as we go," walk away. Professional developers have a structured QA process with real device testing, not just simulators.
- "Can you integrate with South African payment gateways?" — If you need payments in your app, this question is essential. An experienced SA developer should be comfortable with PayFast, Yoco, Peach Payments, or Ozow — not just Stripe.
4. Review Their Development Process
Experience isn't just about code — it's about process. A professional developer or agency should be able to clearly explain:
- How they gather and document requirements
- Their design and prototyping workflow
- How they communicate progress (regular demos? sprint reviews? a project management tool?)
- Their testing and QA methodology
- How they handle App Store submission and post-launch support
Red flag: Vague answers. "We'll figure it out as we go" is not a process — it's a recipe for missed deadlines and blown budgets.
5. Check References — And Actually Call Them
Ask for contact details of previous clients. Then actually call or email them. Ask:
- Did the developer deliver on time and on budget?
- How did they handle changes or unexpected issues?
- Was communication clear and regular?
- Would you hire them again?
- What went wrong — and how did they fix it?
A developer who can't provide references — or whose references all sound suspiciously similar — is a major red flag.
6. Look at How They Sell Themselves
An experienced developer doesn't need to oversell. Watch out for:
- Unrealistic promises: "We'll build your Uber-for-X app in 2 weeks for R20,000." No, they won't.
- No physical presence: A developer or agency with no address, no landline, and no verifiable business registration in South Africa is a risk. If something goes wrong, who do you hold accountable?
- Pressure tactics: "Sign today or the price goes up." Professional developers don't use high-pressure sales. They let their work speak for itself.
- Hidden location: If they claim to be local but can never meet in person, they may be outsourcing your project to developers in another country without telling you.
Why GSDM Passes Every Test
We're not just saying this — here's what you'll find when you check us out:
- Published apps in both the App Store and Google Play under our portfolio
- A real office in Centurion, Gauteng — you're welcome to visit
- A clear, documented development process refined across dozens of projects
- South African payment gateway integration experience (PayFast, Yoco, Peach Payments)
- Real client references we're happy to share
- React Native specialists who can explain exactly why we choose the tools we use
"The best developers don't just write code. They ask questions about your business, your users, and your goals. They think about your app's success — not just delivering a set of features and disappearing."
Looking for a mobile app developer you can trust? Get in touch with GSDM Agency. We'll show you our work, answer your questions, and give you an honest assessment of your project — no pressure, no empty promises.