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Case study: Gymboss

Raising an interval timer app's rating from 3.8 to 4.6

We made the app better to use, and the store rating rose from 3.8 to 4.6.

  • Fitness and Nutrition
  • Startups
Phone showing the Gymboss list of saved timers next to a Gymboss interval timer device

Gymboss is an interval timer app for workouts like Tabata and HIIT. Its store rating was stuck at 3.8. We improved the experience people had every day in the app, and about two months later the rating was 4.6.

Client
Gymboss
Built for
Startups
Area
Fitness and Nutrition
Platforms and tools
iOS, Android
The problem

What they needed

The app already did its main job well. People used it to build and save timers for their workouts. But reviews kept naming the same bugs and awkward screens, and the rating stayed at 3.8.

The app also asked for reviews at random times. Happy users were rarely asked at a good moment, and frustrated users were sometimes asked at a bad one.

What we built

How the app works

We started with the people using the app. We read through their reviews to find what got in their way most, then fixed those bugs and reworked the screens where people got stuck. Workouts ran more smoothly, and the app felt steadier day to day.

With a better experience in place, we made sure happy users were asked to share it at a good moment, not at random. The rating followed the experience: from 3.8 to 4.6 in about two months.

Features

What we delivered

  • Fixes for the bugs named most often in reviews
  • Clearer screens where users had been getting stuck
  • Review prompts shown only after successful use
  • Limits on how often the app asks for a review
Results

What changed

4.6Store rating, up from 3.8 in about two monthsSource App Store and Google Play rating trend, November 2024 to January 2025
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