Comparison

Sleep Lock vs Simple Fasting

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

Head to head
About

Sleep Lock

Features
Read full description

Sleep Lock creates a hard bedtime boundary on your iPhone. Pick the apps that tempt you at night — social, games, news, anything — set your sleep window, and let iOS enforce what willpower can't. When bedtime starts, your selected apps are shielded using Apple's Screen Time framework. Tapping them shows a calm lock screen instead of opening the app. When your sleep window ends, everything unlocks automatically. -- WHAT STAYS AVAILABLE -- Calls, SMS, alarms, emergency features, and any app you didn't select keep working normally throughout the night. Sleep Lock only blocks what you tell it to. -- FEATURES -- • App blocking — shield specific apps, entire categories (Social, Games, Entertainment…), or websites during your sleep window • Custom wake-up alarms — schedule alarms that ring through silent mode and Focus, just like the Clock app • Sleep insights — optional Apple Health integration shows sleep duration, heart rate, and recovery trends from Apple Watch, Xiaomi, Garmin, or any HealthKit source • Streak tracking — see how many nights in a row you've held the line • 5-minute warning — a quiet notification before your sleep window starts so you can wrap up • Emergency unlock — always available if something important comes up, with a streak reset so it means something -- PRIVACY FIRST -- No login. No account. No analytics. No tracking. No marketing push notifications. Your selected apps are stored as opaque tokens on your device — never sent to a server, never visible to us. Sleep data stays in Apple Health. The only data that leaves your device is what's required to validate your subscription. -- HOW IT WORKS -- Sleep Lock uses Apple's Screen Time APIs (FamilyControls, ManagedSettings, DeviceActivity) — the same framework that powers iOS's built-in Screen Time. Authorization is granted by you, for your own device. This is not a parental control app. -- SLEEP LOCK PRO -- All features require a Sleep Lock Pro subscription. • Weekly - $3.99/week • Monthly - $9.99/month • Yearly - $79.99/year All plans include a 3-day free trial for new subscribers. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Terms of Use: https://sleeplock.app/terms Requires iOS 26 or later.

About

Simple Fasting

Features
Read full description

Build a consistent fasting routine without the clutter. Simple Fasting is a focused intermittent fasting timer for tracking both fasting and eating windows. Start with one tap, see your progress at a glance, and learn from your own rhythm over time. SIMPLE FASTING AND EATING TRACKING • Start and stop fasting or eating with one tap • Choose a daily fasting target from 8 to 24+ hours • Adjust start times and add periods you missed • Edit completed periods and review your history • Follow your day with a clear fasting and eating ring KEEP YOUR PROGRESS VISIBLE • Follow an active fast from your Lock Screen • See progress in the Dynamic Island • Add the Simple Fasting widget to your Home Screen • Receive helpful reminders and milestone notifications UNDERSTAND YOUR ROUTINE • Compare fasting and eating time across different periods • Discover your usual and longest fasting windows • See when your eating window typically starts and ends • Follow trends, completed windows, and consistency • Review your current streak, best streak, and tracked days STAY MOTIVATED—WITHOUT PRESSURE • Unlock achievements as you keep tracking • Build a streak through consistent daily use • Join an optional 7-day fasting challenge • Read gentle hints designed to support a sustainable routine PRIVATE AND FOCUSED No account is required. Your fasting and eating records are stored locally on your iPhone. Simple Fasting stays focused on your routine. There is no calorie counting, food logging, water tracking, complicated diet planning, or social feed. New users receive 24 hours of full access. Continued access requires a subscription. Available options and prices are shown before purchase. Simple Fasting is a tracking tool and does not provide medical advice. If fasting becomes uncomfortable, eat something. Consult a qualified healthcare professional before making significant changes to your eating routine. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sleep Lock4 screens
Simple Fasting4 screens

Verdict

The call

The clearest difference is update cadence: Simple Fasting at weekly against Sleep Lock's every 2 months. Simple Fasting also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sleep Lock sells 3 in-app purchases, starting at $3.99 per 7 days and Simple Fasting sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sleep Lock ships an update every 2 months, Simple Fasting weekly. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.

Scorecard2 real differences · 4 level
Sleep Lock versus Simple Fasting: the parameters behind the verdict, then further details
ParameterSleep LockSimple Fasting
PriceFreeFree
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS26.017.0 — better
Further details — not scored
Size19 MB72 MB
Age rating4+4+
DeveloperModestas RazanauskasOleksandr Kryzhanovskyi

In-app purchases

3 purchases

Sleep Lock

Subscriptions3
  • Sleep Lock Pro – Weekly3 Days trial$3.997 Days
  • Sleep Lock Pro – Monthly3 Days trial$9.991 Month
  • Sleep Lock Pro – Yearly3 Days trial$79.991 Year
2 purchases

Simple Fasting

Subscriptions2
  • Premium Weekly$4.997 Days
  • Premium Yearly3 Days trial$19.991 Year

Questions

Is Sleep Lock free?
Sleep Lock is free to download, with in-app purchases available.
Is Simple Fasting free?
Simple Fasting is free to download, with in-app purchases available.
Do Sleep Lock or Simple Fasting have ads?
Neither Sleep Lock nor Simple Fasting shows ads.
Which is updated more often, Sleep Lock or Simple Fasting?
Sleep Lock ships an update every 2 months, and Simple Fasting weekly. Most recently, Sleep Lock was updated on October 13, 2026 and Simple Fasting on September 27, 2026.

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