Comparison

Tempo Interval vs RoundBell

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

Head to head
About

Tempo Interval

This interval timer app offers guided routines for mobility, breathwork, and automatic training logs. It features lock screen control and subtle haptic feedback for seamless workouts. Enjoy customizable sound modes and privacy with no account or data collection.

Highlights
  • Interval timer with customizable cycles
  • Built-in mobility and breathwork routines
  • Automatic training log with streak tracking
  • Lock screen and Dynamic Island controls
  • Haptic feedback for phase changes
  • Multiple sound modes for different environments
Features
Read full description

Tempo is an interval timer with built-in mobility routines, breathwork, and an automatic training log. Set up a session in seconds, lock your phone, and let the timer run. WHAT'S INSIDE - Super Cycle — one interval repeated for N rounds - Cycle — work + rest, looped - Workout — guided bodyweight sequence - Flexibility + Mobility — joint mobility and recovery routines - Wind Down — a short breathing routine before sleep LOCK SCREEN + DYNAMIC ISLAND The timer runs as a Live Activity. Pause and resume from the lock screen or Dynamic Island without unlocking the phone or opening the app. SOUND + HAPTICS Subtle haptics on every phase change so you can train without looking at the screen. Three sound modes — Studio, Gym, Boxing — for different environments. Plays alongside Spotify and Apple Music without interrupting them. TRAINING LOG Every session you complete is logged automatically. Track your streak, see your last 28 days at a glance, and add workouts you did outside the app manually. DARK MODE Toggle in Settings. PRIVACY No accounts. No analytics. No data collection. Everything you log stays on your device. Tempo Interval — by Mehdi Naqvi.

About

RoundBell

Features
Read full description

RoundBell is a gym-grade round and interval timer for boxing, HIIT, and everything with a work and rest rhythm. Big numbers, loud bells, and a warning before every round ends, so your hands stay up and your eyes stay off the clock. Start in seconds with a real built-in library: - Classic boxing, 12 rounds of 3:00 work and 1:00 rest, plus amateur, speed, and heavy-bag variants - HIIT intervals like 40/20 and 30/30 - Tabata, the classic 20/10 by eight, and a double round - EMOM, every minute on the minute - Bodyweight and core circuits, plus mobility and cooldown flows Build your own timer: - Set prepare, rounds, work and rest phases, cooldown, and the bell - Add as many phases per round as you want for real circuits - Pick from six bells and a configurable end-of-round warning During a workout: - A full-bleed display that scales up on iPad and Mac - Bell at every change, a warning beep before work ends, and a 3 2 1 countdown - Haptics and a keep-awake screen, so it works from across the room Keep going and it adds up: - Every session is logged with your day streak, totals, and a weekly-minutes chart - Personal records for best rounds and longest session - A boxing combo of the day with a coaching tip Free and Lifetime: - Free includes the whole built-in library, the full timer, every cue, the log, and up to three saved custom timers - Lifetime is a one-time $9.99 USD purchase that lifts the cap to unlimited custom timers and unlocks training-log exports to CSV and PDF Your custom timers and workout history sync across your iPhone, iPad, and Mac with your private iCloud. No account to create, no ads, and no tracking.

Screenshots

Tempo Interval4 screens
RoundBell4 screens

Verdict

The call

The clearest difference is in-app purchases: Tempo Interval at none against RoundBell's 1. Tempo Interval also leads on update cadence (every 4 days vs every 9 days) and iOS requirement (16.2 vs 18.0). On price, ads 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. RoundBell sells 1 one-off in-app purchase. Tempo Interval asks for nothing beyond the download.

UpkeepUpdate frequency

Tempo Interval ships an update every 4 days, RoundBell every 9 days. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Tempo Interval versus RoundBell: the parameters behind the verdict, then further details
ParameterTempo IntervalRoundBell
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 days — betterEvery 9 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.2 — better18.0
Further details — not scored
Size2 MB5 MB
Age rating4+4+
DeveloperMehdi Akbar NaqviInnovaLabWorks

In-app purchases

None

Tempo Interval

No in-app purchases

1 purchases

RoundBell

One-time1
  • RoundBell Lifetime$49.99

Questions

Is Tempo Interval free?
Tempo Interval is free to download, with no in-app purchases.
Is RoundBell free?
RoundBell is free to download, with in-app purchases available.
Do Tempo Interval or RoundBell have ads?
Neither Tempo Interval nor RoundBell shows ads.
Which is updated more often, Tempo Interval or RoundBell?
Tempo Interval ships an update every 4 days, and RoundBell every 9 days. Most recently, Tempo Interval was updated on October 7, 2026 and RoundBell on September 30, 2026.

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