# Slimmer 65 vs PEAK 75 hard challenge tracker

The clearest difference is in-app purchases: PEAK 75 hard challenge tracker at none against Slimmer 65's 3. PEAK 75 hard challenge tracker also leads on update cadence (weekly vs every 3 weeks). Slimmer 65's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Slimmer 65 sells 3 in-app purchases, starting at $16.49 per month. PEAK 75 hard challenge tracker asks for nothing beyond the download.

Slimmer 65 ships an update every 3 weeks, PEAK 75 hard challenge tracker weekly. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Slimmer 65 | PEAK 75 hard challenge tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/peak-75-hard-challenge-tracker/id6774088844/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 585 MB | 69 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [ILYA SEYFOURI](https://appshunter.io/developer/1891829571) | [Olga Krolikowska](https://appshunter.io/developer/1727507942) |

## What reviewers say

### Slimmer 65

[App page](https://appshunter.io/ios/app/slimmer-65/id6761863273)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slimmer — Monthly | $16.49 | per month |
| Slimmer - Annual Plan | $36.49 | per year |
| Slimmer - 6 Month Plan | $49.99 | per 6 months |


### PEAK 75 hard challenge tracker

[App page](https://appshunter.io/ios/app/peak-75-hard-challenge-tracker/id6774088844)

This app helps you complete popular 75-day challenges by tracking daily habits and progress. Choose from pre-set routines or create your own custom challenge to build discipline and achieve your goals.

**Highlights:** Choose from pre-set or custom challenges, Track workouts, water intake, reading, and more, Visualize progress with daily checklists, Monitor streaks and celebrate completed challenges, Select real-world peaks to represent progress

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Slimmer 65 free?

Slimmer 65 is free to download, with in-app purchases available.

### Is PEAK 75 hard challenge tracker free?

PEAK 75 hard challenge tracker is free to download, with no in-app purchases.

### Do Slimmer 65 or PEAK 75 hard challenge tracker have ads?

Neither Slimmer 65 nor PEAK 75 hard challenge tracker shows ads.

### Which is updated more often, Slimmer 65 or PEAK 75 hard challenge tracker?

Slimmer 65 ships an update every 3 weeks, and PEAK 75 hard challenge tracker weekly. Most recently, Slimmer 65 was updated on October 25, 2026 and PEAK 75 hard challenge tracker on October 14, 2026.

---

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