Comparison

Interval timer · Hiit timer vs VoltTimer

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

Head to head
About

Interval timer · Hiit timer

This workout app offers customizable interval and rest times, with audio guidance that continues even when the app is in the background. Track your progress with detailed history and statistics, and easily repeat past workouts. It's designed to enhance your fitness routine without interrupting your music.

Highlights
  • Customizable interval and rest times
  • Audio guidance (voice or beeps)
  • Background audio support
  • Workout history and statistics
  • Repeat previous workouts
  • Non-interference with music
Features
Read full description

Interval Timer is a flexible and convenient workout app with the following notable features: • Customizable Time Settings: You can easily drag and drop to set the time for workout intervals and rest periods according to your preferences. • Easy Start: Simply tap to begin the countdown timer and start your workout session. • Non-Interference with Music: The app does not interrupt the music you are listening to or other apps on your device. • Guidance via Voice or Beeps: You can choose the form of guidance to monitor and adjust your workout pace. • Audio Guidance even when run the app in background: You can exit the app and still receive guidance through audio, allowing you to focus fully on your exercises. • Detailed History and Statistics: Track your workout progress through automatically recorded data and metrics. • Repeat Previous Workouts: Save time by reusing previous setups and exercises from your workout history. • Multi-Functional Timer: Besides being a workout timer, it can also be used for various other timing purposes. These features make Interval Timer an essential and effective workout assistant for anyone dedicated to improving their fitness and health. Download now to experience and enhance your workout performance starting today! Upgrade to Premium: • Interval Timer subscription is billed monthly to the selected plan. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase Let us know about any bugs, questions, feature requests or any other suggestions. Thank you For more infos, Please visit: https://apps.unitvn.com/terms https://apps.unitvn.com/policy

About

VoltTimer

Features
Read full description

VoltTimer is a clean, no-distractions interval timer built for serious training. Set your work and rest intervals, hit start, and focus — VoltTimer handles the rest. Built for every training style: HIIT, Tabata, and circuit workouts Strength training with custom rest timers Custom presets for your go-to routines Features: Customizable work & rest intervals Audio + haptic phase alerts 5-second end-of-phase countdown warning Adjustable start delay to set up before the clock runs Color themes to match your style Simple enough for beginners. Powerful enough for athletes.

Screenshots

Interval timer · Hiit timer4 screens
VoltTimer4 screens

Verdict

The call

The clearest difference is ads: VoltTimer at none against Interval timer · Hiit timer's shown. Interval timer · Hiit timer's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (14.0 vs 18.6). On price, in-app purchases 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 · Hiit timer sells 3 in-app purchases, starting at $2.99 per 7 days and VoltTimer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval timer · Hiit timer ships an update weekly, VoltTimer every 3 weeks. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 6 level
Interval timer · Hiit timer versus VoltTimer: the parameters behind the verdict, then further details
ParameterInterval timer · Hiit timerVoltTimer
PriceFreeFree
Rating4.8 (16 ratings) — better—
Number of ratings16 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.6
Further details — not scored
Size82 MB6 MB
Age rating4+4+
DeveloperUnitVN.,JSCCherneyWerk LLC

In-app purchases

3 purchases

Interval timer · Hiit timer

Subscriptions2
  • Premium Weekly3 Days trial$2.997 Days
  • Premium Monthly$4.991 Month
One-time1
  • Lifetime package$19.99
1 purchases

VoltTimer

One-time1
  • VoltTimer Pro$3.99

Questions

Is Interval timer · Hiit timer free?
Interval timer · Hiit timer is free to download, with in-app purchases available.
Is VoltTimer free?
VoltTimer is free to download, with in-app purchases available.
Do Interval timer · Hiit timer or VoltTimer have ads?
Interval timer · Hiit timer shows ads; VoltTimer does not.
Which is updated more often, Interval timer · Hiit timer or VoltTimer?
Interval timer · Hiit timer ships an update weekly, and VoltTimer every 3 weeks. Most recently, Interval timer · Hiit timer was updated on October 1, 2026 and VoltTimer on October 7, 2026.

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