# Lerf vs 75 Day Challenge

Lerf and 75 Day Challenge are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Lerf sells 5 in-app purchases, starting at $3.99 per 7 days and 75 Day Challenge sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Lerf | 75 Day Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (15 ratings)](https://appshunter.io/ios/app/lerf-screen-time-app-blocker/id6772977644/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Free | — |
| Size | 14 MB | 11 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Grant Hergenroeder](https://appshunter.io/developer/1729593612) | [Nuno Lopes](https://appshunter.io/developer/1802013711) |

## What reviewers say

### Lerf

[App page](https://appshunter.io/ios/app/lerf-screen-time-app-blocker/id6772977644)

This app helps you regain control of your screen time by blocking distracting applications during specific periods. It offers flexible blocking modes and ambient sounds to support relaxation, study, or sleep. The focus is on protecting your time and peace without intrusive tracking.

**Highlights:** Block distracting apps, Set custom session timers, Easy and Strict blocking modes, Ambient soundscapes, Designed for minimal interaction, Protect personal time

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lerf Weekly | $3.99 | per 7 days |
| Lerf Monthly | $12.99 | per month |
| Lerf Monthly | $14.99 | per month |
| Lerf Annual | $39.99 | per year |
| Lerf Yearly | $79.99 | per year |


### 75 Day Challenge

[App page](https://appshunter.io/ios/app/75-day-challenge-lock/id6807529359)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Unlock | $3.99 | per 7 days |
| Lifetime Unlock | $15.99 | one-time |


## Frequently asked questions

### Is Lerf free?

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

### Is 75 Day Challenge free?

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

### Do Lerf or 75 Day Challenge have ads?

Neither Lerf nor 75 Day Challenge shows ads.

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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.*