Comparison

Lerf vs 75 Day Challenge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Block distracting apps
  • Set custom session timers
  • Easy and Strict blocking modes
  • Ambient soundscapes
  • Designed for minimal interaction
  • Protect personal time
Read full description

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

About

75 Day Challenge

Features
Read full description

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

Lerf3 screens
75 Day Challenge4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ScorecardNo meaningful differences
Lerf versus 75 Day Challenge: the parameters behind the verdict, then further details
ParameterLerf75 Day Challenge
PriceFreeFree
Rating5.0 (15 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings15 — better—
Update frequencyEvery 5 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size14 MB11 MB
Age rating4+4+
DeveloperGrant HergenroederNuno Lopes

In-app purchases

5 purchases

Lerf

Subscriptions5
  • Lerf Weekly$3.997 Days
  • Lerf Monthly$12.991 Month
  • Lerf Monthly7 Days trial$14.991 Month
Show 2 more
  • Lerf Annual7 Days trial$39.991 Year
  • Lerf Yearly14 Days trial$79.991 Year
2 purchases

75 Day Challenge

Subscriptions1
  • Weekly Unlock3 Days trial$3.997 Days
One-time1
  • Lifetime Unlock$15.99

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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