# Interval Timer HIIT Timer ++ vs The Lill Gym

The clearest difference is in-app purchases: The Lill Gym at none against Interval Timer HIIT Timer ++'s 1. The Lill Gym also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). Interval Timer HIIT Timer ++'s advantage is update cadence (fortnightly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Interval Timer HIIT Timer ++ sells 1 in-app purchase, starting at $1.99 per 7 days. The Lill Gym asks for nothing beyond the download.

Interval Timer HIIT Timer ++ ships an update fortnightly, The Lill Gym every 5 weeks. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Interval Timer HIIT Timer ++ | The Lill Gym |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Size | 7 MB | 31 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Appwallet Technologies Private Limited](https://appshunter.io/developer/1581780855) | [Benny Lill Fitness Limited](https://appshunter.io/developer/1847949868) |

## What reviewers say

### Interval Timer HIIT Timer ++

[App page](https://appshunter.io/ios/app/interval-timer-hiit-timer-plus-plus/id6737910658)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HIIT | $1.99 | per 7 days |


### The Lill Gym

[App page](https://appshunter.io/ios/app/the-lill-gym/id6754342039)

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer HIIT Timer ++ free?

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

### Is The Lill Gym free?

The Lill Gym is free to download, with no in-app purchases.

### Do Interval Timer HIIT Timer ++ or The Lill Gym have ads?

Interval Timer HIIT Timer ++ shows ads; The Lill Gym does not.

### Which is updated more often, Interval Timer HIIT Timer ++ or The Lill Gym?

Interval Timer HIIT Timer ++ ships an update fortnightly, and The Lill Gym every 5 weeks. Most recently, Interval Timer HIIT Timer ++ was updated on October 9, 2026 and The Lill Gym on September 30, 2026.

---

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