Lerf vs 75 Day Challenge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lerf
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.
- Block distracting apps
- Set custom session timers
- Easy and Strict blocking modes
- Ambient soundscapes
- Designed for minimal interaction
- Protect personal time
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10 minutes on your phone turned into 2 hours. Again. Do Not Disturb stops notifications. Lerf turns your phone back into a tool that supports your goals. HOW IT WORKS Choose apps, set a schedule (optional) or tap start and distracting apps lock down. No streaks. No account. Nothing to check. Flexible Mode lets you end blocking early. Strict Mode keeps your apps blocked until the timer (or schedule) ends. FOR Focus: work or study without negotiating with your phone. Sleep: less scrolling before bed. Family time: set boundaries around distracting apps so family time means actually being together. PRICING Lerf is free to download. Full access is $12.99 a month or $39.99 a year after a 7-day free trial. Cancel anytime in Settings. WHY LERF Our smartphones are our greatest tools and our worst distractions. Lerf's mission is to turn smartphones back into tools, helping people take back control of their time, attention, and technology. PRIVACY Lerf uses Apple's Screen Time framework. Your app choices and usage stay on your phone. Lerf never sees them, and there's no account to create. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lerfapp.com/privacy
75 Day Challenge
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A 75-day habit challenge you can actually finish. Pick Strict, Soft, Medium, or Custom. Check off the day. Take a private photo. Lock it in. WHAT YOU GET • Daily checklist for workouts, water, reading, diet, and a progress photo • Strict, Soft, Medium, or your own rules • A 75-day grid that shows locked, missed, and days still ahead • Private photos on this iPhone. Compare any two days. • A Day Card you can share when you lock the day • Widgets for the Home Screen and Lock Screen • Reminders you control HOW IT WORKS 1. Choose a preset and a start date 2. Do the work 3. Lock the day before midnight On Strict, a missed day restarts the attempt. Soft and Medium keep going. History and photos stay. Unlock with a 3-day free trial, then a weekly plan, or pay once for lifetime. Not affiliated with any third-party challenge brand. Privacy Policy: https://tedstudios.online/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Lerf | 75 Day Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (15 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Grant Hergenroeder | Nuno Lopes |
In-app purchases
Lerf
- Lerf Weekly$3.997 Days
- Lerf Monthly$12.991 Month
- Lerf Monthly7 Days trial$14.991 Month
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- Lerf Annual7 Days trial$39.991 Year
- Lerf Yearly14 Days trial$79.991 Year
75 Day Challenge
- Weekly Unlock3 Days trial$3.997 Days
- Lifetime Unlock$15.99





