# 75 Days Challenge vs Arc

The clearest difference is ads: Arc at none against 75 Days Challenge's shown. Arc also leads on review sentiment (100% vs 88%). 75 Days Challenge's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 75 Days Challenge sells 3 in-app purchases, starting at $4.99 per 7 days and Arc sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

75 Days Challenge ships an update every 2 weeks, Arc every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | 75 Days Challenge | Arc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (113 ratings)](https://appshunter.io/ios/app/75-days-challenge-reset75/id6761861091/reviews)** | — |
| Number of ratings | **113** | — |
| Positive reviews | 88.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 18 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [EHM TECH LLC](https://appshunter.io/developer/1484023806) | [岚烜 吴](https://appshunter.io/developer/6788589687) |

## What reviewers say

### 75 Days Challenge

[App page](https://appshunter.io/ios/app/75-days-challenge-reset75/id6761861091)

This app helps you complete self-improvement challenges with customizable tasks, progress tracking, and motivational tools. Log daily activities, capture progress photos, and generate timelapse videos. All your data is stored securely on your device.

**Highlights:** Customizable challenge templates, Daily task logging with multiple input types, Progress photo capture and timelapse video generation, Detailed statistics and insights, Shareable progress cards, On-device data storage, Home screen widgets

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Weekly | $4.99 | per 7 days |
| Pro - Annual | $19.99 | per year |
| Pro - Annual | $39.99 | per year |


### Arc

[App page](https://appshunter.io/ios/app/arc-75-day-challenge-tracker/id6796747380)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Arc Pro Monthly | $2.99 | per month |
| Arc Pro Yearly | $19.99 | per year |
| Arc Pro | $29.99 | one-time |


## Frequently asked questions

### Is 75 Days Challenge free?

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

### Is Arc free?

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

### Do 75 Days Challenge or Arc have ads?

75 Days Challenge shows ads; Arc does not.

### Which is updated more often, 75 Days Challenge or Arc?

75 Days Challenge ships an update every 2 weeks, and Arc every 9 days. Most recently, 75 Days Challenge was updated on October 31, 2026 and Arc on October 31, 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.*