How to build a tip calculator app for iOS
What a tip calculator app needs
- A bill amount field with a fast number pad
- A tip percent, with quick presets and a custom option
- The tip amount and the grand total, updating as you type
- A split between any number of people, showing the per-person amount
- A round-up option, to the nearest dollar or a clean total
- Optional handling for tax included or excluded
- A nice touch: a widget or a Control for an even faster open
Everything should be on one screen and update live. The whole appeal is that it is faster and clearer than doing the math in your head or a generic calculator.
How to build it with AppFlight
Describe it in plain English, for example: "A tip calculator with a bill field, tip percent presets plus a custom value, and a live total. Let me split the bill between any number of people and show the per-person amount, with an option to round up to a clean total. Keep it all on one clean screen." AppFlight plans the screen, generates native SwiftUI, and launches it in a live simulator so you can type a bill and watch the split update immediately. Because the scope is small, you can polish quickly, then iterate in plain language, for example adding a widget, a dark theme, or a history of recent bills.
Monetization for a tip calculator app
Be realistic: a tip calculator is hard to monetize, and that is fine. People expect this kind of utility to be free, so a steep subscription rarely makes sense. The honest options are a one-time purchase to remove ads or unlock themes and extra features, or keeping the app free as a portfolio piece that proves you can ship. If you do add a paid tier, a RevenueCat paywall can handle a one-time unlock as easily as a subscription. The real value of this build is learning the pipeline end to end, which carries over to a bigger app you can charge for.
Shipping it to the App Store
When the app is ready, AppFlight signs the build, uploads to TestFlight so you can try it on your own device, then submits to the App Store with metadata and screenshots from the simulator. If Apple rejects the build, AppFlight reads the reason, works on the fix, and resubmits. A very simple utility can draw extra scrutiny under Apple's minimum functionality expectations, so make the app genuinely useful and well-designed, and add a widget or a thoughtful touch that sets it apart. Apple reviews every app, so a submission is not the same as an approval, but the whole pipeline runs without you opening Xcode.
FAQ
Is a tip calculator a good first app to build?
Yes. It is small, the logic is simple, and it touches the full pipeline: a clean SwiftUI screen, a widget, signing, and submission. It is a sensible way to learn the whole flow before building something larger.
How do tip calculator apps make money?
Most do not earn much. The realistic options are a one-time purchase to remove ads or unlock themes, or keeping it free as a portfolio piece. A heavy subscription is hard to justify for a single calculation.
What features actually matter here?
Speed and clarity. The bill, the tip percent, the total, and the per-person split should all be visible at once and update instantly as you type. Round-up and a custom tip are nice additions.