# HIIT Training Interval Timer vs ToDoTimer

The clearest difference is in-app purchases: ToDoTimer at none against HIIT Training Interval Timer's 1. ToDoTimer also leads on ads (none vs shown) and update cadence (daily vs every 9 months). HIIT Training Interval Timer's advantage is device support (3 vs 1). On price and iOS requirement there is nothing between them.

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

HIIT Training Interval Timer ships an update every 9 months, ToDoTimer daily. The most recent releases landed on September 25, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | HIIT Training Interval Timer | ToDoTimer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/hiit-training-interval-timer/id1615538751/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 1 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [kiyoshi yamamoto](https://appshunter.io/developer/1482640077) |

## What reviewers say

### HIIT Training Interval Timer

[App page](https://appshunter.io/ios/app/hiit-training-interval-timer/id1615538751)

This application helps manage the duration of your high-intensity interval training workouts. You can create and customize various timers to fit your specific exercise routines. It is designed to be intuitive, simple, and easy to operate.

**Highlights:** Create and edit custom timers, Manage full HIIT workout time, Intuitive and simple interface, Workout customization

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $5.99 | one-time |


### ToDoTimer

[App page](https://appshunter.io/ios/app/todotimer/id1625522688)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HIIT Training Interval Timer free?

HIIT Training Interval Timer is free to download, with in-app purchases available.

### Is ToDoTimer free?

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

### Do HIIT Training Interval Timer or ToDoTimer have ads?

HIIT Training Interval Timer shows ads; ToDoTimer does not.

### Which is updated more often, HIIT Training Interval Timer or ToDoTimer?

HIIT Training Interval Timer ships an update every 9 months, and ToDoTimer daily. Most recently, HIIT Training Interval Timer was updated on September 25, 2026 and ToDoTimer on October 6, 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.*