Comparison

HIIT Timer vs MuscleTrainingTimer

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

Head to head
About

HIIT Timer

Features
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【HIIT Timerとはどんなアプリ?】 20秒のトレーニングと10秒の休憩を繰り返しカウントするタイマーです。 BGM・効果音でスマホを見ずにトレーニングが可能です。 起動してすぐ開始できます。 さっそくトレーニングを開始しよう。 【HIITとは】 HIITとは、高強度インターバルトレーニングの略称です。 高強度の全力運動を繰り返し行うことで、心拍数を上昇させ効率的に筋肥大・カロリー消費を行うトレーニングです。 【使い方】 セット数を選択し、スタートボタンでトレーニングを開始できます。 ストップでタイマーを停止できます。 その場合は、再度スタートボタンでトレニングを再開できます。 再度、1からトレーニングを始めたい場合やセット数の変更は、リセットボタンを押すことでセット数の選択が可能になります。 設定画面では、BGMと効果音の設定を変更することができます。 【便利機能】 ・セット数だけ設定すれば、すぐにトレーニングが始められます。 ・BGMでトレーニングと休憩の切り替えがわかるので、スマホを見ずにトレーニングに集中することができます。 【機能一覧】 ・セット数選択(1~16セット) ・カウントダウン(トレーニング20秒・休憩10秒) ・BGMと効果音 【アップデート情報 Ver1.1】 AppStoreの一部表記を修正

About

MuscleTrainingTimer

Features
Read full description

The all-in-one interval timer for HIIT, Tabata, circuit & strength training — designed by a Physical Therapist. Build multi-exercise routines, keep your own music playing, and stay on pace with 50+ sound cues, Live Activities, and 26 customizable themes. ■ WORKOUT BUILDER - Combine multiple exercises into one routine with rounds and rest between blocks - Ladder workouts like 21-15-9, plus reps-based or time-based intervals - Cooldown periods and per-block notes for weight, distance or target reps - Start instantly with ready-made presets ■ SOUND & MUSIC - 50+ sound effects: per-second ticks, interval signals, countdown & finish cues - Layers over your music — plays on top without stopping Apple Music, Spotify or podcasts - Turn individual sounds on/off; spoken cues announce "Work", "Rest" and more - Background playback with the screen locked, plus haptic feedback ■ CONTROLS - Start, pause, resume, reset - Skip to the next phase or step back to the previous one - Voice commands ("Start", "Pause", "Reset") and Siri Shortcuts ■ MAKE IT YOURS - 26 color themes or build your own palette - Ring or linear layout, solid or glass background, adjustable spacing - Live Activity & Dynamic Island show your phase and time on the Lock Screen ■ ORGANIZE & SHARE - Full-text search, favorites, and sorting by usage, created or updated date - Share routines by QR code or link, and save your own templates - Log sets with weight, reps & notes; auto-sync to Apple Health - Workout reminders on the days and times you choose ■ FREE & PRO Use the core timer for free. Upgrade to Pro for unlimited menus, multi-block workouts, Live Activities, custom themes, Apple Health sync, voice control, reminders & more — monthly, yearly, or one-time lifetime. ----------Designed by a Physical Therapist-------------- This app was developed by a physical therapist. Exercises performed with efficient time management are easier to sustain and more effective. Whether you train at the gym, do CrossFit or yoga, study, or work through rehabilitation, preset values let you start right away. Free sound files from Springin Sound Stock https://www.springin.org/sound-stock/ Free sound files from Sound Effect Labo https://soundeffect-lab.info/ Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HIIT Timer4 screens
MuscleTrainingTimer1 screens

Verdict

The call

The clearest difference is in-app purchases: HIIT Timer at none against MuscleTrainingTimer's 1. MuscleTrainingTimer's advantage is ads (none vs shown) and update cadence (every 9 days vs every 5 months). On price, 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. MuscleTrainingTimer sells 1 one-off in-app purchase. HIIT Timer asks for nothing beyond the download.

UpkeepUpdate frequency

HIIT Timer ships an update every 5 months, MuscleTrainingTimer every 9 days. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 3 level
HIIT Timer versus MuscleTrainingTimer: the parameters behind the verdict, then further details
ParameterHIIT TimerMuscleTrainingTimer
PriceFreeFree
Update frequencyEvery 5 monthsEvery 9 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.2 — better16.0
Further details — not scored
Size9 MB20 MB
Age rating4+4+
Developermasaaki gennoryo muranaka

In-app purchases

None

HIIT Timer

No in-app purchases

1 purchases

MuscleTrainingTimer

One-time1
  • Lifetime Pro$19.99

Questions

Is HIIT Timer free?
HIIT Timer is free to download, with no in-app purchases.
Is MuscleTrainingTimer free?
MuscleTrainingTimer is free to download, with in-app purchases available.
Do HIIT Timer or MuscleTrainingTimer have ads?
HIIT Timer shows ads; MuscleTrainingTimer does not.
Which is updated more often, HIIT Timer or MuscleTrainingTimer?
HIIT Timer ships an update every 5 months, and MuscleTrainingTimer every 9 days. Most recently, HIIT Timer was updated on September 19, 2026 and MuscleTrainingTimer on September 14, 2026.

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