Comparison

Mariabs · Interval Timer 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

Mariabs · Interval Timer

Features
Read full description

Mari is a sharp, minimal interval timer for anyone who trains in rounds — tabata, HIIT, EMOM, circuits, or your own custom intervals. Set your prepare, work, rest, cycles, blocks, and block-rest durations in seconds. Press the white play button. Mari counts you in, calls out each phase, and chimes the final 3-2-1 of every interval so you can keep your eyes on what you're doing instead of on the screen. WHAT YOU GET • Six adjustable parameters: prepare, work, rest, cycles per block, number of blocks, and rest between blocks • Voice cues for every transition: "Prepare", "Work", "Rest", and "Block complete — get ready for the next" • Distinct musical chimes per phase, generated on-device, synced with light haptics • 3-2-1 countdown ticks before each phase change • Big, monochrome timer dial with a subtle progress ring tinted to the current phase • Cycle and block progress shown at all times so you always know where you are • Plays over your music — Spotify, Apple Music, podcasts — and ducks them only when Mari speaks • Stays awake automatically while a workout is running • Settings remembered between launches DESIGNED TO STAY OUT OF THE WAY The screen is dark, glanceable from across a gym, and built around one button. There are no menus, no levels, no streaks, no badges, no analytics. You configure once, then press play. PRIVACY Mari collects nothing. No account. No email. No analytics. No tracking. Your settings stay on your device. The privacy policy is one page; you can read it before you tap install. NO ADS Mari has no ads, no in-app purchases, and no premium tier. No account required.

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

Mariabs · Interval Timer4 screens
Interval Timer by STRNTH4 screens

Verdict

The call

The clearest difference is in-app purchases: Mariabs · Interval Timer at none against Interval Timer by STRNTH's 1. Mariabs · Interval Timer also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Mariabs · Interval Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Mariabs · Interval Timer ships an update every 6 days, Interval Timer by STRNTH every 10 days. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 4 level
Mariabs · Interval Timer versus Interval Timer by STRNTH: the parameters behind the verdict, then further details
ParameterMariabs · Interval TimerInterval Timer by STRNTH
PriceFreeFree
Update frequencyEvery 6 days — betterEvery 10 days
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.215.1 — better
Further details — not scored
Size4 MB55 MB
Age rating4+12+
DeveloperPER MAGNE HELSETHNext Big Leap Ltd

In-app purchases

None

Mariabs · Interval Timer

No in-app purchases

1 purchases

Interval Timer by STRNTH

One-time1
  • Remove ads$9.99

Questions

Is Mariabs · Interval Timer free?
Mariabs · Interval Timer 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 Mariabs · Interval Timer or Interval Timer by STRNTH have ads?
Interval Timer by STRNTH shows ads; Mariabs · Interval Timer does not.
Which is updated more often, Mariabs · Interval Timer or Interval Timer by STRNTH?
Mariabs · Interval Timer ships an update every 6 days, and Interval Timer by STRNTH every 10 days. Most recently, Mariabs · Interval Timer was updated on September 21, 2026 and Interval Timer by STRNTH on September 18, 2026.

Other comparisons