# 90 Day Challenge vs WorkoutStack

The clearest difference is update cadence: WorkoutStack at weekly against 90 Day Challenge's monthly. 90 Day Challenge's advantage is iOS requirement (15.1 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 90 Day Challenge sells 5 in-app purchases, starting at $1.99 per month and WorkoutStack sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

90 Day Challenge ships an update monthly, WorkoutStack weekly. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 90 Day Challenge | WorkoutStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (14 ratings)](https://appshunter.io/ios/app/90-day-challenge-resettr/id6743643363/reviews)** | — |
| Number of ratings | **14** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 87 MB | 29 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [John Kevin Basco](https://appshunter.io/developer/1803746571) | [Neurondigital Ltd](https://appshunter.io/developer/1501534441) |

## What reviewers say

### 90 Day Challenge

[App page](https://appshunter.io/ios/app/90-day-challenge-resettr/id6743643363)

Build lasting habits with a personalized 90-day program tailored to your lifestyle and goals. This offline-first app offers custom tasks for sleep, water, exercise, and more, with progressive challenges and visual progress tracking.

**Highlights:** Personalized 90-day habit program, Customized daily tasks, Progressive difficulty, Offline functionality, Visual progress tracking, Focus on sleep, water, exercise, and screen time

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly | $1.99 | per month |
| Yearly - Bonus | $4.49 | per year |
| Monthly Pro | $7.99 | per month |
| yearly | $14.99 | per year |
| Yearly Pro | $29.99 | per year |


### WorkoutStack

[App page](https://appshunter.io/ios/app/workoutstack-workout-tracker/id6772119478)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WorkoutStack Monthly Plan | $4.99 | per month |
| WorkoutStack Yearly Plan | $24.99 | per year |
| WorkoutStack Tracker Lifetime Plan | $59.99 | one-time |


## Frequently asked questions

### Is 90 Day Challenge free?

90 Day Challenge is free to download, with in-app purchases available.

### Is WorkoutStack free?

WorkoutStack is free to download, with in-app purchases available.

### Do 90 Day Challenge or WorkoutStack have ads?

Neither 90 Day Challenge nor WorkoutStack shows ads.

### Which is updated more often, 90 Day Challenge or WorkoutStack?

90 Day Challenge ships an update monthly, and WorkoutStack weekly. Most recently, 90 Day Challenge was updated on September 29, 2026 and WorkoutStack on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*