# 21 Days Habit Transformation vs Transform 75

The clearest difference is ads: 21 Days Habit Transformation at none against Transform 75's shown. 21 Days Habit Transformation also leads on iOS requirement (15.6 vs 17.0). Transform 75's advantage is update cadence (weekly vs every 4 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 21 Days Habit Transformation sells 1 one-off in-app purchase and Transform 75 sells 6 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

21 Days Habit Transformation ships an update every 4 months, Transform 75 weekly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 21 Days Habit Transformation | Transform 75 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/transform-75-hard-challenge/id6741768601/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 113 MB | 54 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GREWON TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1589043091) | [Ahammed Zabith P](https://appshunter.io/developer/1795464757) |

## What reviewers say

### 21 Days Habit Transformation

[App page](https://appshunter.io/ios/app/21-days-habit-transformation/id6467082746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime access | $5.99 | one-time |


### Transform 75

[App page](https://appshunter.io/ios/app/transform-75-hard-challenge/id6741768601)

This app helps you track progress through a 75-day physical and mental challenge. It provides tools for logging daily tasks, workouts, hydration, and meals, with features to capture progress photos and set reminders. Users can also share their journey and track multiple attempts.

**Highlights:** Daily progress tracking, Workout and meal logging, Hydration monitoring, Progress photo capture, Personalized reminders, Multiple attempt tracking, Social sharing

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $2.99 | per month |
| Yearly Subscription with offer | $8.99 | per year |
| Yearly Subscription | $8.99 | per year |
| Lifetime | $8.99 | one-time |
| Transform75 - Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is 21 Days Habit Transformation free?

21 Days Habit Transformation is free to download, with in-app purchases available.

### Is Transform 75 free?

Transform 75 is free to download, with in-app purchases available.

### Do 21 Days Habit Transformation or Transform 75 have ads?

Transform 75 shows ads; 21 Days Habit Transformation does not.

### Which is updated more often, 21 Days Habit Transformation or Transform 75?

21 Days Habit Transformation ships an update every 4 months, and Transform 75 weekly. Most recently, 21 Days Habit Transformation was updated on November 3, 2026 and Transform 75 on November 4, 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.*