# Calorie Diff vs Aion Longevity

The clearest difference is in-app purchases: Calorie Diff at none against Aion Longevity's 1. Calorie Diff also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.1). Aion Longevity's advantage is update cadence (every 4 days vs fortnightly). On price and device support there is nothing between them.

Both are free to download. Aion Longevity sells 1 in-app purchase, starting at $4.99 per month. Calorie Diff asks for nothing beyond the download.

Calorie Diff ships an update fortnightly, Aion Longevity every 4 days. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Calorie Diff | Aion Longevity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calorie-diff/id6444097631/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 28 MB | 53 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Reme Le Hane](https://appshunter.io/developer/1652274005) | [Aion Longevity LTD](https://appshunter.io/developer/1788209936) |

## What reviewers say

### Calorie Diff

[App page](https://appshunter.io/ios/app/calorie-diff/id6444097631)

Easily track your daily calorie balance by viewing active, rest, and dietary intake. See your surplus or deficit at a glance, with optional macro tracking and historical data for the past month.

**Highlights:** Calorie surplus/deficit visualization, Active, Rest, and Dietary calorie tracking, Optional macro tracking (Carbs, Fats, Protein), 7, 14, and 30-day calorie history, Apple Health integration

**In-app purchases:** none


### Aion Longevity

[App page](https://appshunter.io/ios/app/aion-longevity/id6758638095)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aion Pro Monthly | $4.99 | per month |


## Frequently asked questions

### Is Calorie Diff free?

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

### Is Aion Longevity free?

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

### Do Calorie Diff or Aion Longevity have ads?

Aion Longevity shows ads; Calorie Diff does not.

### Which is updated more often, Calorie Diff or Aion Longevity?

Calorie Diff ships an update fortnightly, and Aion Longevity every 4 days. Most recently, Calorie Diff was updated on October 24, 2026 and Aion Longevity on October 15, 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.*