# Interval Timer HIIT Timer ++ vs Filtra AI

The clearest difference is in-app purchases: Filtra AI at none against Interval Timer HIIT Timer ++'s 1. Filtra AI also leads on ads (none vs shown). Interval Timer HIIT Timer ++'s advantage is update cadence (fortnightly vs every 3 months). On price, device support and iOS requirement 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. Filtra AI asks for nothing beyond the download.

Interval Timer HIIT Timer ++ ships an update fortnightly, Filtra AI every 3 months. Both last shipped on October 9, 2026.

## The numbers

| Metric | Interval Timer HIIT Timer ++ | Filtra AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 7 MB | 28 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Appwallet Technologies Private Limited](https://appshunter.io/developer/1581780855) | [Radu Dintiu](https://appshunter.io/developer/1760522546) |

## 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 |


### Filtra AI

[App page](https://appshunter.io/ios/app/filtra-ai/id6755113815)

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

**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 Filtra AI free?

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

### Do Interval Timer HIIT Timer ++ or Filtra AI have ads?

Interval Timer HIIT Timer ++ shows ads; Filtra AI does not.

### Which is updated more often, Interval Timer HIIT Timer ++ or Filtra AI?

Interval Timer HIIT Timer ++ ships an update fortnightly, and Filtra AI every 3 months. Most recently, Interval Timer HIIT Timer ++ was updated on October 9, 2026 and Filtra AI on October 9, 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.*