Calorie Diff vs Aion Longevity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calorie Diff
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.
- 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
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This app is for users like me who want a quick glance at their daily calories. We have many nutrition apps out there, but not all of them display the complete picture, I wanted to easily be able to see whether or not I was sitting in a surplus or a deficit depending on my current training/nutrition goals. My preferred nutrition app only pulls in exercises, ignoring rest and general active calories, only giving part of the picture. This app simply pulls in the Active, Rest and Dietary calories from Apple Health and displays the combined Burned Calories, Consumed Calories and the difference between them. We optionally also display the 3 macros, Carbs, Fats and Protein, this can be enabled in the settings tab, where you will also need to set your goal values per day. On the history tab, you are able to view a list of your calories over the last 7, 14 and 30 days. --------------- Requirements --------------- This app requires that the device has the Apple Health app installed and access to the following permissions: - Active Energy - Resting Energy - Dietary energy Optionally, for those who also wish to view their Macros within the app, we would need the following permissions: - Carbohydrates - Protein - Total Fats ---------------------- Supported languages ---------------------- English German Spanish Hindi Arabic Portuguese French Russian Japanese Korean Malay Vietnamese Turkish Tamil Italian Polish Ukrainian Romanian Dutch Thai Hungarian Czech Swedish Hebrew Slovak Danish Finnish Norwegian Chinese (Simplified)
Aion Longevity
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Personal AI performance and longevity coach. Aion requires a subscription. It includes a 1-month free trial, then renews monthly. Disclaimer: Aion provides AI-generated estimations of biomarkers, daily actions, supplement suggestions, trends and strategies for informational and educational purposes only. It is not a medical device and does not provide medical advice, diagnosis or treatment. Always consult a qualified healthcare professional before making any changes to your medication, supplements or lifestyle based on information from this app. Privacy Policy: https://www.aionlongevity.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 9, 2026 and October 15, 2026 respectively.
| Parameter | Calorie Diff | Aion Longevity |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 28 MB | 53 MB |
| Age rating | 4+ | 17+ |
| Developer | Reme Le Hane | Aion Longevity LTD |
In-app purchases
Calorie Diff
No in-app purchases
Aion Longevity
- Aion Pro Monthly1 Month trial$4.991 Month









