# HIIT 4x4 Lite vs Biteify

The clearest difference is in-app purchases: HIIT 4x4 Lite at none against Biteify's 3. HIIT 4x4 Lite also leads on iOS requirement (12.0 vs 16.4). Biteify's advantage is update cadence (every 6 days vs every 25 months). On price, ads and device support there is nothing between them.

Both are free to download. Biteify sells 3 in-app purchases, starting at $4.99 per month. HIIT 4x4 Lite asks for nothing beyond the download.

HIIT 4x4 Lite ships an update every 25 months, Biteify every 6 days. The most recent releases landed on September 21, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | HIIT 4x4 Lite | Biteify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hiit-4x4-lite/id1558498996/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 18 MB | 48 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eastridge Technology](https://appshunter.io/developer/392920417) | [VLAD ANDREI MOTOI](https://appshunter.io/developer/6801189482) |

## What reviewers say

### HIIT 4x4 Lite

[App page](https://appshunter.io/ios/app/hiit-4x4-lite/id1558498996)

This app guides you through High Intensity Interval Training (HIIT) workouts using your heart rate as a guide. It sequences exercise between high and low intensity intervals, displaying your progress on a speedometer-style dial. Warning chimes alert you if your heart rate falls outside the target zone.

**Highlights:** High Intensity Interval Training (HIIT) guidance, Heart rate monitoring based on MHR percentage, Speedometer-style heart rate dial, Warning chimes for out-of-range heart rate, Based on NTNU's 4x4 HIIT program

**Features:** macOS Compatibility

**In-app purchases:** none


### Biteify

[App page](https://appshunter.io/ios/app/biteify/id6801189480)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Biteify Premium - Monthly | $4.99 | per month |
| Biteify Premium - Annual | $29.99 | per year |
| Biteify Premium - Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is HIIT 4x4 Lite free?

HIIT 4x4 Lite is free to download, with no in-app purchases.

### Is Biteify free?

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

### Do HIIT 4x4 Lite or Biteify have ads?

Neither HIIT 4x4 Lite nor Biteify shows ads.

### Which is updated more often, HIIT 4x4 Lite or Biteify?

HIIT 4x4 Lite ships an update every 25 months, and Biteify every 6 days. Most recently, HIIT 4x4 Lite was updated on September 21, 2026 and Biteify on October 4, 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.*