Lerf vs oooLog
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
Read full descriptionHide 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
oooLog
Read full descriptionHide full description
Your workout starts when you walk in the door. ooolog automatically logs your workouts using the places you save — your gym, your yoga studio, the climbing wall. Arrive, and the session starts. Leave, and it's saved. No timers, no start buttons, no forgetting. HOW IT WORKS • Save the places where you work out • ooolog quietly watches for arrivals using geofences — no GPS tracking of your movements • Every visit is logged with its duration, automatically • Your history builds itself: streaks, time totals, and your most-visited places BETTER WITH FRIENDS Follow your workout buddies and see the time they're putting in at the places you share. A little friendly accountability goes a long way. PRIVATE BY DESIGN ooolog only monitors the specific places you choose — never your location in general. Your workout history stays on your device and syncs only what's needed to share with people you approve. Sign in with Apple, no ads, no data sold. Ever. Getting started takes one minute: sign in, save a place, and forget the app exists. That's the point.
Screenshots
Verdict
The clearest difference is in-app purchases: oooLog at none against Lerf's 5. Lerf's advantage is update cadence (every 5 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.
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. oooLog asks for nothing beyond the download.
Lerf ships an update every 5 days, oooLog fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Lerf | oooLog |
|---|---|---|
| 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 — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Grant Hergenroeder | Openings Corp |
In-app purchases
Lerf
- Lerf Weekly$3.997 Days
- Lerf Monthly$12.991 Month
- Lerf Monthly7 Days trial$14.991 Month
Show 2 moreShow fewer
- Lerf Annual7 Days trial$39.991 Year
- Lerf Yearly14 Days trial$79.991 Year
oooLog
No in-app purchases









