Comparison

Intervals One vs Rest

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

Head to head
About

Intervals One

Features
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Intervals One – Your Interval Training Coach The interval timer designed for real workouts. Crystal-clear voice guidance, effortless setup, and intelligent features that adapt to how you train. No clutter. No complexity. Just smart interval training that helps you build better workouts and stay focused. TWO MODES. INFINITE POSSIBILITIES. Simple Mode: Perfect for quick sessions. Set your timing for all exercises at once, hit start, and let the voice guidance coach you through every phase. Ideal for consistent HIIT, Tabata, circuits, or bodyweight training. Premium users can customize each exercise stage with specific movements, reps, and effort levels. Advanced Mode: Complete control. Customize every exercise with individual timings per round, choose specific movements from our exercise library, set rep targets or effort levels, and build structured training programs that match your goals. WHY ATHLETES CHOOSE INTERVALS ONE Clear Voice Coaching: Professional voiceovers - announce every phase, exercise, and transition. Train eyes-free with clear, motivating guidance that keeps you in the zone. Intuitive Design: Create workouts in seconds with our distraction-free interface. No complicated builders or endless menus - just fast, focused setup that gets you moving. Works Everywhere: Train offline, indoors, or outdoors. No internet required once downloaded. Works perfectly with AirPods, speakers, or silent mode with haptics. PERFECT FOR - HIIT & Tabata intervals - AMRAP (As Many Reps As Possible) - Circuit training - Bodyweight workouts - Strength & conditioning - Cardio intervals - Functional fitness - CrossFit-style training SMART COACHING FEATURES - Next exercise cues so you're always prepared - Halfway alerts to pace yourself - Round completion announcements - Customizable countdown timers - Haptic feedback for silent training - Adjustable audio cues - Round recovery periods PRIVACY FIRST Your workout data stays yours. No account required. Optional iCloud sync keeps your workouts and history private and secure across your devices. START FREE Get unlimited basic interval workouts with full timing customization and premium voice guidance - completely free. Upgrade to Premium when you're ready for exercise selection, rep tracking, and advanced per-round customization. Download Intervals One and experience smarter interval training today. Privacy Policy: https://www.ninetysixsoftware.co.uk/hiit-privacy-policy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Rest

Features
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Log a set and Rest starts your rest timer on its own, with the right duration for the exercise: more time after heavy squats and deadlifts, less after curls and lateral raises. No guessing, no forgetting to start the clock. AUTOMATIC REST TIMER • 5 rest tiers by exercise type: heavy compound 4 min, compound 3 min, accessory 2 min, isolation 90 s, light isolation 60 s • 100+ exercises already classified • Set your own rest time for any exercise and Rest remembers it LOCK SCREEN & DYNAMIC ISLAND • The countdown stays on your Lock Screen and in the Dynamic Island with Live Activities • See the exercise and set at a glance, without unlocking your phone • Haptics and a notification when it's time for the next set FAST SET LOGGING • Weight and reps, nothing else • Last session's numbers are pre-filled: one tap logs the set and starts the timer ROUTINES, HISTORY & PROGRESSION • Save your splits as routines (push, pull, legs...) or start an empty workout • Browse and edit past sessions, copy a clean workout summary to your notes • Charts per exercise: max weight, estimated 1RM, volume and personal records • Weekly volume and muscle group breakdown PRIVATE & OFFLINE • No account, no sign-up • Your workouts are stored on your iPhone and the app works without a connection, even in a basement gym • Export and import your data to move to a new phone kg or lbs, light and dark themes. REST PRO Rest Pro unlocks the whole app: automatic rest timer, Live Activities, unlimited routines, history and progression. Choose a yearly subscription with a 7-day free trial, or a monthly subscription. Payment is charged to your Apple Account at confirmation of purchase (at the end of the trial for the yearly plan). Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Built by a lifter, for lifters. Terms of Use (EULA): https://rest.naelostudio.com/terms Privacy Policy: https://rest.naelostudio.com/privacy

Screenshots

Intervals One4 screens
Rest4 screens

Verdict

The call

The clearest difference is update cadence: Rest at every 3 weeks against Intervals One's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

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

Both are free to download. Intervals One sells 3 in-app purchases, starting at $1.99 per month and Rest sells 2 in-app purchases, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Intervals One ships an update every 4 months, Rest every 3 weeks. The most recent releases landed on October 9, 2026 and October 28, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Intervals One versus Rest: the parameters behind the verdict, then further details
ParameterIntervals OneRest
PriceFreeFree
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size64 MB73 MB
Age rating4+4+
DeveloperNinety Six Software LtdVeil-it

In-app purchases

3 purchases

Intervals One

Subscriptions2
  • Pro Monthly7 Days trial$1.991 Month
  • Pro Annual$14.991 Year
One-time1
  • Pro Lifetime$19.99
2 purchases

Rest

Subscriptions1
  • Pro Annual7 Days trial$24.991 Year
One-time1
  • Rest Pro$59.99

Questions

Is Intervals One free?
Intervals One is free to download, with in-app purchases available.
Is Rest free?
Rest is free to download, with in-app purchases available.
Do Intervals One or Rest have ads?
Neither Intervals One nor Rest shows ads.
Which is updated more often, Intervals One or Rest?
Intervals One ships an update every 4 months, and Rest every 3 weeks. Most recently, Intervals One was updated on October 9, 2026 and Rest on October 28, 2026.

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