Comparison

4 vs Plank Timer

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

Head to head
About

4

Features
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Master your nervous system with the 4-7-8 breathing method. Designed beautifully and built entirely to help you find your center, this app guides you through the scientifically-backed breathing technique pioneered for deep relaxation, anxiety reduction, and achieving rapid, restful sleep. HOW IT WORKS The 4-7-8 technique acts as a natural tranquilizer for your nervous system: β€’ Inhale quietly through your nose for 4 seconds β€’ Hold your breath for 7 seconds β€’ Exhale completely through your mouth for 8 seconds No confusing menus, no audio distractionsβ€”just a calming, fluid visual orb guiding your breath exactly when you need it most. WHY YOU'LL LOVE IT β€’ Fall Asleep Faster: Use the app in bed to quiet racing thoughts and transition gracefully into deep sleep. β€’ Instantly Reduce Stress: Down-regulate your nervous system during nervous moments at work, before presentations, or in traffic. β€’ Built for Focus: A clean, distraction-free interface utilizing premium glassmorphic UI that naturally adapts to your environment. β€’ Session Tracking: Gently tracks your usage to help you build a lifelong mindfulness habit without aggressive notifications. 100% FREE, NO STRINGS ATTACHED Mindfulness should be accessible to everyone. β€’ NO Subscriptions β€’ NO In-App Purchases β€’ NO Accounts or Logins needed β€’ NO Advertisements TOTAL PRIVACY Your peace of mind is our priority. The app operates 100% locally on your device. We do not track you, we do not require camera or mic capabilities, and we absolutely do not collect or sell your data. Find your calm today.

About

Plank Timer

Features
Read full description

A plank timer that calls out every second for you. Set the hold, put the phone down, and let the voice, the 3-2-1 beeps and the haptic buzz tell you exactly when to brace, when you're halfway, and when you're done. Most people quit the plank early because they keep peeking at a stopwatch. This app takes the screen out of the equation: a full-screen countdown ring, spoken "Hold" and "Rest" cues, a halfway alert to keep your core tight, and a get-set countdown before every set. Then it logs the hold, grows your streak, and pushes the next target a little higher. WHAT YOU GET - Hold longer without watching the clock: voice cues, countdown beeps and haptics carry you through every second - Never wonder what comes next: multi-set core routines that chain forearm, high, side and reverse planks with timed rest between holds - A month-long plan that actually ramps: the 30-Day Plank Challenge takes you from a 20-second hold to a 5-minute hold, rest days included - Proof you are getting stronger: streak, longest hold, total core minutes, weekly total and a 7 / 14 / 30-day chart of core seconds per day - A level that climbs with you, from Core Rookie to Plank Master, so 40 honest seconds today still counts - Form you can trust: plain-English guides on plank technique, the four variations, the mistakes that kill results, and how to train safely PERFECT FOR - Beginners who can barely hold 20 seconds and want a plan, not a stopwatch - Anyone chasing a personal best on the forearm plank - Desk workers building core strength for posture and a happier lower back - Home and travel training with zero equipment and zero setup WHY NOT JUST USE THE STOPWATCH APP? A stopwatch makes you stare at your phone in the exact position where lifting your head wrecks your form. This one speaks. It counts you in, warns you at the halfway mark, beeps the last three seconds, buzzes when a set flips to rest, keeps the screen awake, and then writes the hold into your history so tomorrow's target is based on something real. A stopwatch forgets you the second you stop it. PRIVACY Every hold, streak and setting stays on your iPhone. No account, no sign-up, no ads, no tracking, no cloud upload. The whole app works offline, on a plane or in a basement gym. FULL ACCESS The full app opens with a membership: all four plank variations, all four multi-set routines, the 30-Day Plank Challenge and the 14-Day Core Reset, the custom-duration timer, your full history, and the charts and trends in Progress. Choose weekly, yearly, or a one-time lifetime unlock that never renews. Weekly and yearly renew automatically unless cancelled at least 24 hours before the period ends; manage or cancel anytime in your App Store account settings. Restore Purchases is in Settings. Start with a 30-second forearm plank today and let the timer talk you through the rest. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Email tphuc.work@gmail.com

Screenshots

44 screens
Plank Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: 4 at none against Plank Timer's 2. Plank Timer's advantage is iOS requirement (17.0 vs 26.4). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Plank Timer sells 2 in-app purchases, starting at $2.99 per 7 days. 4 asks for nothing beyond the download.

Scorecard2 real differences Β· 4 level
4 versus Plank Timer: the parameters behind the verdict, then further details
Parameter4Plank Timer
PriceFreeFree
Update frequencyβ€”Every 6 weeks
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS26.417.0 β€” better
Further details β€” not scored
Size11 MB6 MB
Age rating4+4+
DeveloperXiong ChenPhuc Pham

In-app purchases

None

4

No in-app purchases

2 purchases

Plank Timer

Subscriptions2
  • Weekly$2.997 Days
  • Yearly$14.991 Year

Questions

Is 4 free?
4 is free to download, with no in-app purchases.
Is Plank Timer free?
Plank Timer is free to download, with in-app purchases available.
Do 4 or Plank Timer have ads?
Neither 4 nor Plank Timer shows ads.

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