Comparison

21 Days vs Screen Time Control

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

Head to head
About

21 Days

Features
Read full description

Build habits that actually stick — 21 days at a time. 21 Days Challenge is a simple and powerful habit tracker designed for real, lasting change. Pick a goal, commit for 21 days, check in daily, and watch your streak grow one day at a time. Whether you want to drink more water, read every day, exercise, meditate, or build any daily routine, 21 Days Challenge keeps you focused, motivated, and consistent. KEY FEATURES • Multiple Habit Challenges Track several habits at once including health, fitness, learning, productivity, mindfulness, and more — all from one home screen. • Streaks & Milestones Watch your streak grow daily. Reach milestones at Day 7 and Day 14, and unlock badges as you build consistency. • Daily Journal Add quick notes, moods, or reflections with each check-in. Discover patterns and understand what works best for you. • Insightful Stats View beautiful charts showing completion rates, mood trends, and overall progress. • Smart Reminders Set custom reminders for each challenge at the times that work best for you. • Private by Default Your data stays on your device. Optional cloud sync is designed with privacy in mind. HOW IT WORKS 1. Pick your challenge — choose a suggested habit or create your own 2. Check in daily — track progress with a single tap 3. Build momentum — strengthen routines through consistency BUILT FOR EVERY KIND OF GROWTH • Health & fitness — water, sleep, movement • Learning & focus — reading, studying, skill-building • Productivity — deep work, discipline, routines • Mindfulness & wellness — meditation, gratitude, journaling • Creativity — writing, drawing, creating • Personal goals — anything that matters to you Start your first 21 days today with 21 Days Challenge — your habit tracker, streak builder, and daily journal for lasting change. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Screen Time Control

This app helps you build healthy habits by locking distracting apps until your goals are met. It uses photo proof for habit verification and offers a personalized visual world to motivate your progress. Rest days are accommodated without breaking your momentum.

Highlights
  • App blocking until habits are completed
  • Photo proof for habit verification
  • Customizable habit enforcement
  • Progress tracking that forgives missed days
  • AI-generated personalized visual worlds
  • On-device privacy for all data
Features
Read full description

LockLive is an app blocker and habit tracker in one. Choose the apps that distract you, and they stay locked until the habits that build your life are done. You already know the life you want: calmer mornings, a body you've cared for, real time with the people you love, a craft you actually returned to. And you know exactly where that time goes instead. The scroll. The game that was going to be ten minutes. The limits you set and ignore. The app you delete and download again by Thursday. Willpower isn't the plan anymore. LockLive is. YOUR APPS WAIT UNTIL YOUR HABITS ARE DONE Choose the apps that take your time - the feeds, the games, whichever ones pull you. Each day they stay locked until the habits you've gated are finished - then they open. No countdown to bargain with, no limit to dismiss. Apple's Screen Time technology does the blocking, entirely on your device. THE HABIT APP THAT CAN'T BE LIED TO Anyone can tap Done and keep scrolling. When it matters, LockLive asks for proof: snap a photo of the made bed, the shoes on your feet, the page you wrote. Your promise to yourself, protected from your own five seconds of weakness. YOU CHOOSE THE TEETH Every habit gets exactly the enforcement you give it: just track it, prove it with a photo, or lock apps behind it. Every lock is set by you and only you. Lock & Live is your own hand on the door - never a nanny. PROGRESS THAT FORGIVES YOU Firm about today, kind about yesterday. There are no streaks to break: a missed day is a dip in your score, not a reset to zero. The gate holds today's line; it never punishes you for yesterday's. BUILT FOR REAL LIFE Rest days are part of the plan, not a failure of it. Rest a habit for sickness, travel, or a hard week, and its progress holds while Lock & Live picks back up with you. There is always an honest way through a hard day - that's what makes the locks livable. A WORLD PAINTED FOR WHAT YOU'RE BUILDING Describe what you're working toward in a few words, and Lock & Live's AI paints you a space for it: a beautiful, personal world made just for you. Your habits live inside that space, building the life it pictures. It's a glimpse of who you're becoming, not another gray checklist. PAINTING CREDITS & PURCHASES Painting your space is powered by AI, so it runs on credits. Your subscription includes 30 painting credits each month, and creating or changing a painting uses one. If you want to keep adjusting beyond your monthly amount, you can buy an optional one-time pack of 50 extra credits ($4.99) that never expire. Everything else - all your habits, locks, history, and core features - is included with your subscription and never uses credits. PRIVATE BY DESIGN Everything lives on your device. No account, no cloud, no one watching over your shoulder. Even proof photos never leave your phone. The reward was never the phone. It's the mornings, the body, the work, the people - the life your habits build while the feed waits its turn. Your apps can wait. Your life can't. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.locknlive.com/privacy

Screenshots

21 Days4 screens
Screen Time Control4 screens

Verdict

The call

The clearest difference is update cadence: Screen Time Control at every 2 days against 21 Days's every 3 weeks. 21 Days's advantage is iOS requirement (15.0 vs 18.0). 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. 21 Days sells 4 in-app purchases, starting at $0.99 per month and Screen Time Control sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

21 Days ships an update every 3 weeks, Screen Time Control every 2 days. The most recent releases landed on October 30, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
21 Days versus Screen Time Control: the parameters behind the verdict, then further details
Parameter21 DaysScreen Time Control
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size46 MB116 MB
Age rating4+4+
DeveloperiLoma TechnologyJohn Engleman

In-app purchases

4 purchases

21 Days

Subscriptions4
  • Pro Monthly$0.991 Month
  • Ultra Pro Monthly$0.991 Month
  • Pro Yearly$4.991 Year
Show 1 more
  • Ultra Pro Yearly$9.991 Year
3 purchases

Screen Time Control

Subscriptions2
  • Sona Habits Pro (Monthly)$9.991 Month
  • Sona Habits Pro (Yearly)7 Days trial$49.991 Year
One-time1
  • 50 Painting Credits$4.99

Questions

Is 21 Days free?
21 Days is free to download, with in-app purchases available.
Is Screen Time Control free?
Screen Time Control is free to download, with in-app purchases available.
Do 21 Days or Screen Time Control have ads?
Neither 21 Days nor Screen Time Control shows ads.
Which is updated more often, 21 Days or Screen Time Control?
21 Days ships an update every 3 weeks, and Screen Time Control every 2 days. Most recently, 21 Days was updated on October 30, 2026 and Screen Time Control on October 7, 2026.

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