Comparison

Stretch Timer Interval HIIT vs One Plank

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

Head to head
About

Stretch Timer Interval HIIT

This app helps you build and maintain a consistent stretching routine. Customize your workouts with adjustable sets and times, track your progress with a calendar view, and enjoy a user-friendly interface with dark mode support. It's designed to make daily stretching an effortless habit.

Highlights
  • Customizable sets and times
  • Multiple stretching menus
  • Calendar history view
  • Adjustable sound effects
  • Dark mode support
  • Automatic backup (premium)
Features
Read full description

【English Version】 Stay on track as the timer automatically alternates between work and rest. Customize each interval to fit your workout and train your way. Perfect for interval training, strength training, HIIT, circuit training, stretching, and more. Simply set your work time, rest time, and number of sets, and you’re ready to begin. Whether you work out at home or at the gym, this app makes it easy to stay active. It’s also a great choice if you want to build a consistent routine—starting with just two or three workouts a week—to support your health and fitness goals. 【PERFECT FOR YOU IF YOU WANT TO】 • Customize work intervals, rest intervals, and the number of sets • Switch automatically between work and rest • Strength train at home or at the gym • Use a timer for HIIT or circuit training • Focus on your workout instead of counting seconds • Save workout routines tailored to your needs • Review your workout days and track your consistency • Build a lasting exercise habit to stay healthy and fit 【KEY FEATURES】 • Set work and rest intervals freely • Choose the number of sets and repetitions for automatic cycling • Create and register multiple workout routines • Save your custom timers and routines • View the remaining time and current set at a glance with a large, easy-to-read display • Get interval alerts with sound effects, voice countdowns, and vibration • Review your workout history in a calendar • Customize the theme color, background music, and volume • Dark Mode support 【GREAT FOR】 • Interval training • Strength training • HIIT • Circuit training • Bodyweight workouts • Stretching • Yoga • Warm-ups • Core training Create your own routine once, and there’s no need to set it up again. Just open the app and jump straight into your regular workout. Your workout history is displayed in a calendar, making it easy to look back on the days you exercised and see how consistently you’ve kept going. Make your daily workouts simpler with an interval timer that works at your pace. 【PREMIUM FEATURES】 The Premium Plan includes the following features: • No banner or full-screen ads • Full theme color customization • Automatic data backup 【ABOUT THE PREMIUM PLAN】 • This is a monthly auto-renewing subscription. • If a free trial is available, the trial period will be shown on the purchase screen. • Please review the price and subscription period on the in-app purchase screen before subscribing. • Your Apple Account will be charged once the purchase is confirmed. • Your subscription renews automatically unless auto-renewal is turned off at least 24 hours before the end of the current subscription period. • To view or cancel your subscription, open Settings on your iPhone, tap your name, then tap Subscriptions. 【RESTORE PURCHASES】 If you switch to a new device, you can restore your purchased features by signing in with the same Apple Account used for the original purchase. In the app, go to Settings, then select Restore Premium Purchase. 【TERMS OF USE】 https://nilcraft.jp/terms?lang=en 【PRIVACY POLICY】 https://nilcraft.jp/privacy_policy?lang=en

About

One Plank

Read full description

A simple plank timer for building a daily core habit. Tap Start, then just listen. Sounds and short voice cues guide you, so you don't have to watch the screen. Made to keep you going - Tell us how it felt: Hard, Just right or Easy. When it keeps feeling easy, we suggest adding 5 seconds - Keep going past your goal and try for a personal best - Tough day? Do just 10 seconds to keep your streak (up to twice a week) - Celebrate milestones and unlock new app icons, like a gold crown at 30 days Features - Goal from 10 to 300 seconds, in 5-second steps - Form tips during your plank, read aloud - Streak, personal best and a 4-week history - Widgets, Lock Screen widgets and a Control Center button - Save planks to Health as core training (optional) - Start with Siri, Shortcuts or the Action button - Daily reminder at the time you choose No account needed. Your records stay on your iPhone. No ads during your plank.

Screenshots

Stretch Timer Interval HIIT4 screens
One Plank4 screens

Verdict

The call

The clearest difference is in-app purchases: One Plank at none against Stretch Timer Interval HIIT's 2. On price, update cadence, ads 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. Stretch Timer Interval HIIT sells 2 in-app purchases, starting at $3.99 per month. One Plank asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Stretch Timer Interval HIIT versus One Plank: the parameters behind the verdict, then further details
ParameterStretch Timer Interval HIITOne Plank
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeksEvery 2 weeks
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size259 MB10 MB
Age rating4+4+
DeveloperNilCraft Inc.AKITO YAMAZAKI

In-app purchases

2 purchases

Stretch Timer Interval HIIT

Subscriptions2
  • Premium Features14 Days trial$3.991 Month
  • Premium features$39.991 Year
None

One Plank

No in-app purchases

Questions

Is Stretch Timer Interval HIIT free?
Stretch Timer Interval HIIT is free to download, with in-app purchases available.
Is One Plank free?
One Plank is free to download, with no in-app purchases.
Do Stretch Timer Interval HIIT or One Plank have ads?
Both Stretch Timer Interval HIIT and One Plank show ads.
Which is updated more often, Stretch Timer Interval HIIT or One Plank?
Stretch Timer Interval HIIT ships an update every 2 weeks, and One Plank every 2 weeks. Most recently, Stretch Timer Interval HIIT was updated on October 27, 2026 and One Plank on October 25, 2026.

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