# KetoAir vs Forever App

The clearest difference is rating: Forever App at 5.0 against KetoAir's 1.5. On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Forever App holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | KetoAir | Forever App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/ketoair/id1671355214/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/forever-app/id6761488966/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 60 MB | 12 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qi Diagnostics Limited](https://appshunter.io/developer/1636454031) | [Forever Labs, Inc.](https://appshunter.io/developer/1889922858) |

## What reviewers say

### KetoAir

[App page](https://appshunter.io/ios/app/ketoair/id1671355214)

This device and companion app help you monitor your body's fat-burning status by measuring acetone levels in your breath. Get instant, accurate results to understand how your diet and exercise affect your ketosis.

**Highlights:** Instant breath acetone measurement, Accurate real acetone sensor, Bluetooth device connectivity, Log ketosis records, Monitor fat-burning status, Track diet and exercise impact

**Features:** macOS Compatibility

**In-app purchases:** none


### Forever App

[App page](https://appshunter.io/ios/app/forever-app/id6761488966)

Monitor your banked stem cells, manage your storage subscription, and access the latest in regenerative medicine. View your cell collection details, read curated articles, and update your profile. Refer friends to earn rewards.

**Highlights:** Monitor banked stem cells, Manage storage subscription, View cell collection details, Read regenerative medicine articles, Update personal information, Refer friends for rewards

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

**In-app purchases:** none


## Frequently asked questions

### Is KetoAir free?

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

### Is Forever App free?

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

### Which has better reviews, KetoAir or Forever App?

Forever App is rated higher. KetoAir averages 1.5 out of 5 from 2 ratings, while Forever App averages 5.0 from 3 ratings.

### Do KetoAir or Forever App have ads?

Neither KetoAir nor Forever App shows ads.

### Which is updated more often, KetoAir or Forever App?

KetoAir ships an update every 2 months, and Forever App every 2 months. Most recently, KetoAir was updated on November 3, 2026 and Forever App on November 5, 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.*