# iHIIT vs PSMF Diet

The clearest difference is review sentiment: PSMF Diet at 100% against iHIIT's 0%. PSMF Diet also leads on price (Free vs $0.99). iHIIT's advantage is update cadence (every 3 months vs every 12 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

PSMF Diet is free to download; iHIIT costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iHIIT ships an update every 3 months, PSMF Diet every 12 months. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | iHIIT | PSMF Diet |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/psmf-diet/id6747286421/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Mu-sonic](https://appshunter.io/developer/791324889) | [Clint Tustison](https://appshunter.io/developer/1807066687) |

## What reviewers say

### iHIIT

[App page](https://appshunter.io/ios/app/ihiit-flexible-interval-timer/id1515036694)

This interval timer app allows for the creation of complex, customized workout routines with a clear display. It offers flexible programming options, voice cues for intervals, and the ability to skip steps. Track your progress with elapsed time features.

**Highlights:** Customizable interval timer creation, Nested rounds and intervals, Clear countdown display, Skip current step functionality, Configurable count-in signals, Interval name read aloud

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

**In-app purchases:** none


### PSMF Diet

[App page](https://appshunter.io/ios/app/psmf-diet/id6747286421)

This app supports medically-supervised weight loss programs by providing tools to track macros, water intake, and wellness. It features a personalized calculator, educational resources, and privacy-focused local data storage.

**Highlights:** Personalized PSMF macro calculator, Daily macro and water tracking, Wellness check-ins and mood logging, Progress charts and trend analysis, Educational resources, Diet scheduling and refeed management, Local data storage for privacy

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iHIIT free?

iHIIT costs $0.99, with no in-app purchases.

### Is PSMF Diet free?

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

### Do iHIIT or PSMF Diet have ads?

Neither iHIIT nor PSMF Diet shows ads.

### Which is updated more often, iHIIT or PSMF Diet?

iHIIT ships an update every 3 months, and PSMF Diet every 12 months. Most recently, iHIIT was updated on September 27, 2026 and PSMF Diet on September 29, 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.*