Comparison

Interval Timer by STRNTH vs Strongbell

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

Head to head
About

Interval Timer by STRNTH

Features
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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, color, 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 color 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. - An optional get-ready countdown before you start, from 3 to 30 seconds. - Choose what the screen shows: interval time, total time, interval count, the clock or heart rate. MORE TOOLS - A countdown tab with saved presets for a fast single timer. - Workout reminders on the days and time you choose. - A stopwatch with laps that highlight your fastest and slowest split. - Workout history that logs every session so you can look back and run any timer again. - Light and dark themes and your own custom step colors. - Share a timer as a link or a file, and import timers others send you. ON THE BIG SCREEN - Show a running timer on a TV with AirPlay, Chromecast or a wired adapter. - Your phone stays the controller while the big screen stays in step. ACROSS YOUR DEVICES - An Apple Watch companion runs your timers on the wrist with color 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. One payment removes ads for good. No sign up, no accounts and no subscriptions. Your timers stay on your device. Part of the STRNTH family of training apps.

About

Strongbell

Features
Read full description

Strongbell builds a kettlebell plan around you, shows you every lift and takes you through every set, with a coach who calls out your sets and rests. A PLAN BUILT AROUND YOU Tell Strongbell your goal, your experience, how many days a week and how many minutes you have, and which kettlebells you own, in pounds or kilograms. It builds a six-week program: the hinge and the swing first, then squats, cleans, presses, rows and get-ups when you are ready for them. Finish your sets as planned twice in a row and it offers the next bell you own or more reps, one step at a time. When the six weeks are done, the next block starts denser, with your heavier bells. Reminders on your training days, if you want them. GUIDED, SET BY SET Every workout shows the exercise, the reps and the bell of each set, and times your rests. Log your reps with one tap when a set is done. A COACH IN YOUR EAR The coach calls out every set, counts down the rests with tones and tells you what comes next, over your own music and with your phone locked. The Lock Screen shows the rest counting down, with a button for the set. YOUR OWN WORKOUTS Put together a workout of your own from the exercises: sets, or a circuit done round after round, the way a complex is done with one bell. EVERY LIFT ON VIDEO 23 kettlebell exercises, each with a video from one or more angles and written steps: Swing, Clean, Snatch, High pull, Overhead press, Push press, Goblet squat, Front squat, Deadlift, Bent-over row, Reverse lunge, Thruster, Turkish get-up, Windmill, Halo, Farmer carry, Single-leg deadlift, Floor press, Glute bridge, Cossack squat, Seated twist, Rack carry and Overhead carry. SWING PRACTICES Daily practice (100 swings, 10 get-ups), 10,000 swings, Swing EMOM and Swing ladder. PROGRESS YOU CAN SEE Swings per week, streaks, records, and volume by exercise and by bell. Open any workout to correct it, log one you did without the app, export them all as a spreadsheet, or share one as a picture. Your workouts can be saved to Apple Health. ON YOUR HOME SCREEN Widgets show your next workout and your week, on the Home Screen and the Lock Screen. Ask Siri to start today's workout. PRIVATE No account and no ads. Your workouts stay on your iPhone; the app collects no data. STRONGBELL PRO Strongbell is a subscription: yearly with a 7-day free trial, or monthly. The price for your country is shown in the app before you subscribe. Payment is charged to your Apple Account. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it anytime in Settings โ€บ Apple Account โ€บ Subscriptions. TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ PRIVACY POLICY https://druidori.com/appstore/strongbell/privacy.html

Screenshots

Interval Timer by STRNTH4 screens
Strongbell4 screens

Verdict

The call

The clearest difference is ads: Strongbell at none against Interval Timer by STRNTH's shown. Strongbell also leads on update cadence (daily vs every 3 weeks). Interval Timer by STRNTH's advantage is device support (4 vs 1) and iOS requirement (15.1 vs 18.0). On price and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Interval Timer by STRNTH sells 1 one-off in-app purchase and Strongbell sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval Timer by STRNTH ships an update every 3 weeks, Strongbell daily. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

Scorecard4 real differences ยท 2 level
Interval Timer by STRNTH versus Strongbell: the parameters behind the verdict, then further details
ParameterInterval Timer by STRNTHStrongbell
PriceFreeFree
Update frequencyEvery 3 weeksDaily โ€” better
AdsYesNo โ€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod, Apple Watch โ€” betteriPhone
Requires iOS15.1 โ€” better18.0
Further details โ€” not scored
Size56 MB16 MB
Age rating12+4+
DeveloperNext Big Leap Ltddruidori s.r.o

In-app purchases

1 purchases

Interval Timer by STRNTH

One-time1
  • Remove ads$9.99
2 purchases

Strongbell

Subscriptions2
  • Strongbell Pro Monthly$4.991 Month
  • Strongbell Pro Yearly7 Days trial$29.991 Year

Questions

Is Interval Timer by STRNTH free?
Interval Timer by STRNTH is free to download, with in-app purchases available.
Is Strongbell free?
Strongbell is free to download, with in-app purchases available.
Do Interval Timer by STRNTH or Strongbell have ads?
Interval Timer by STRNTH shows ads; Strongbell does not.
Which is updated more often, Interval Timer by STRNTH or Strongbell?
Interval Timer by STRNTH ships an update every 3 weeks, and Strongbell daily. Most recently, Interval Timer by STRNTH was updated on November 5, 2026 and Strongbell on November 6, 2026.

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