# HIIT Timer vs VoltTimer

The clearest difference is in-app purchases: HIIT Timer at none against VoltTimer's 1. HIIT Timer also leads on iOS requirement (15.0 vs 18.6). VoltTimer's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. VoltTimer sells 1 one-off in-app purchase. HIIT Timer asks for nothing beyond the download.

HIIT Timer ships an update every 2 weeks, VoltTimer every 3 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | HIIT Timer | VoltTimer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Ad-supported | — |
| Size | 90 MB | 6 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [tsyk-app](https://appshunter.io/developer/1586870924) | [CherneyWerk LLC](https://appshunter.io/developer/1887149773) |

## What reviewers say

### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-interval-and-tabata/id1586870922)

This app provides a simple interval timer for various high-intensity training styles like HIIT, Tabata, EMOM, and AMRAP. Track your workouts, maintain streaks, and save custom timer presets for easy access. It's designed for home or gym training and requires no account or subscription.

**Highlights:** HIIT & Tabata timer, EMOM interval training, AMRAP workout mode, Workout calendar tracking, Streak and stats tracking, Customizable presets, Smart workout reminders

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### VoltTimer

[App page](https://appshunter.io/ios/app/volttimer-workout-timer/id6760988281)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VoltTimer Pro | $3.99 | one-time |


## Frequently asked questions

### Is HIIT Timer free?

HIIT Timer is free to download, with no in-app purchases.

### Is VoltTimer free?

VoltTimer is free to download, with in-app purchases available.

### Do HIIT Timer or VoltTimer have ads?

HIIT Timer shows ads; VoltTimer does not.

### Which is updated more often, HIIT Timer or VoltTimer?

HIIT Timer ships an update every 2 weeks, and VoltTimer every 3 weeks. Most recently, HIIT Timer was updated on October 7, 2026 and VoltTimer on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*