Comparison

Round vs Interval Timer by STRNTH

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

Head to head
About

Round

This interval timer is designed for high-intensity interval training (HIIT), Tabata, and circuit workouts. It allows users to create custom routines with multiple exercises and track their progress. The app offers haptic alerts and can be controlled from an Apple Watch.

Highlights
  • Customizable interval routines
  • HIIT, Tabata, and circuit training support
  • Apple Watch control
  • Haptic alerts for round changes
  • Visual arc timer
  • Workout progress tracking
  • Apple Health integration
Features
Read full description

Round is a visual interval timer for HIIT, Tabata, circuit training, strength workouts, mobility, and stretching. TRAIN WITH 3D MOVEMENT GUIDES Choose from 71 exercises and see each movement in 3D while building your routine and while the timer runs. Side-specific and alternating exercises are handled clearly, so you always know what comes next. BUILD A ROUTINE IN SECONDS • Start with a ready-made template or build from the exercise catalog • Reorder, duplicate, edit, and delete steps directly • Add custom exercises with your own name and emoji • Set work, step rest, set rest, preparation, and number of sets STAY FOCUSED • Follow the 3D animation or switch to a larger remaining-time display • See your current step, progress, and upcoming lineup at a glance • Audio and haptic cues announce every transition WORKS WITH WATCH Control your workout from your wrist and receive haptic cues without reaching for your iPhone. TRACK YOUR PROGRESS • Sessions are logged automatically • Review total training time, streaks, and your most-used routines • Save workouts to Apple Health • Delete individual history entries whenever needed No account. No ads. Fully offline.

About

Interval Timer by STRNTH

Features
Read full description

Interval Timer by STRNTH is a free interval timer for HIIT, Tabata, EMOM, AMRAP, boxing rounds, running intervals, stretching and more. Build any timer you want with no fixed structure, then run it hands-free and read it from across the room. BUILD ANY TIMER - Add as many steps as you like, each with its own label, duration, colour, sound and voice. - Group steps into repeat blocks so a round loops as many times as you need. - Link separate timers together to chain a warm-up, workout and cool-down into one session. - Start from a template: Couch to 5K, Tabata, HIIT, 7 minute workout, EMOM, AMRAP, boxing rounds, Pomodoro, box breathing and full body stretch. RUN IT HANDS-FREE - A giant readout inside a progress ring, sized to read from across the gym. - Full-screen colour per step so you know your phase at a glance. - Voice reads each step and announces what is next before it arrives. - Sound cues on the last three seconds, plus beep, go, switch, rest, bell, horn, gong and whistle tones. Import your own sounds too. - Optional spoken 3-2-1 countdown, a cadence metronome from 60 to 180 BPM and haptic feedback. - Choose what the screen shows: interval time, total time, interval count, the clock or heart rate. MORE TOOLS - A countdown tab with quick presets for a fast single timer. - A stopwatch with laps that highlight your fastest and slowest split. - Light and dark themes and your own custom step colours. - Share a timer as a link or a file, and import timers others send you. ACROSS YOUR DEVICES - An Apple Watch companion runs your timers on the wrist with colour and haptics. - Pair a Bluetooth heart rate strap to see live BPM, zones and more while you train. - Save finished sessions to Apple Health as workouts. - Back up your timers to your private iCloud. FREE, WITH A ONE-TIME UPGRADE Interval Timer is free and supported by ads. A single 9.99 purchase removes ads for good. No accounts, no subscriptions, no cloud sign-in. Your timers stay on your device. Part of the STRNTH family of training apps.

Screenshots

Round4 screens
Interval Timer by STRNTH4 screens

Verdict

The call

The clearest difference is in-app purchases: Round at none against Interval Timer by STRNTH's 1. Round also leads on ads (none vs shown). Interval Timer by STRNTH's advantage is iOS requirement (15.1 vs 17.2). On price, update cadence 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. Interval Timer by STRNTH sells 1 one-off in-app purchase. Round asks for nothing beyond the download.

UpkeepUpdate frequency

Round ships an update weekly, Interval Timer by STRNTH every 10 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 6 level
Round versus Interval Timer by STRNTH: the parameters behind the verdict, then further details
ParameterRoundInterval Timer by STRNTH
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeekly — betterEvery 10 days
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.215.1 — better
Further details — not scored
Size35 MB55 MB
Age rating4+12+
DeveloperRyosuke NakayamaNext Big Leap Ltd

In-app purchases

None

Round

No in-app purchases

1 purchases

Interval Timer by STRNTH

One-time1
  • Remove ads$9.99

Questions

Is Round free?
Round is free to download, with no in-app purchases.
Is Interval Timer by STRNTH free?
Interval Timer by STRNTH is free to download, with in-app purchases available.
Do Round or Interval Timer by STRNTH have ads?
Interval Timer by STRNTH shows ads; Round does not.
Which is updated more often, Round or Interval Timer by STRNTH?
Round ships an update weekly, and Interval Timer by STRNTH every 10 days. Most recently, Round was updated on October 10, 2026 and Interval Timer by STRNTH on October 5, 2026.

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