# Quantum Body vs Fuel. Smart calorie tracker

The clearest difference is in-app purchases: Fuel. Smart calorie tracker at none against Quantum Body's 2. Fuel. Smart calorie tracker also leads on update cadence (every 6 days vs fortnightly). Quantum Body's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Quantum Body sells 2 in-app purchases, starting at $9.99 per month. Fuel. Smart calorie tracker asks for nothing beyond the download.

Quantum Body ships an update fortnightly, Fuel. Smart calorie tracker every 6 days. The most recent releases landed on October 15, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Quantum Body | Fuel. Smart calorie tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/quantum-body/id6752645253/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Freemium | — |
| Size | 128 MB | 17 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Quantum Body LLC](https://appshunter.io/developer/1840367537) | [Clean Whale](https://appshunter.io/developer/1584548877) |

## What reviewers say

### Quantum Body

[App page](https://appshunter.io/ios/app/quantum-body/id6752645253)

This app helps you track manifestations, gratitude, intentions, dreams, and synchronicities. It offers widgets for your home and lock screens to keep your practice visible and provides a calm, organized space for reflection and alignment.

**Highlights:** Track manifestations, gratitude, intentions, dreams, synchronicities, Home and Lock Screen widgets, Log entries with text and images, Search and filter past entries, Minimalist interface, Encrypted and secure, Export entries

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Annual | $99.99 | per year |


### Fuel. Smart calorie tracker

[App page](https://appshunter.io/ios/app/fuel-smart-calorie-tracker/id6799176366)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Body free?

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

### Is Fuel. Smart calorie tracker free?

Fuel. Smart calorie tracker is free to download, with no in-app purchases.

### Do Quantum Body or Fuel. Smart calorie tracker have ads?

Neither Quantum Body nor Fuel. Smart calorie tracker shows ads.

### Which is updated more often, Quantum Body or Fuel. Smart calorie tracker?

Quantum Body ships an update fortnightly, and Fuel. Smart calorie tracker every 6 days. Most recently, Quantum Body was updated on October 15, 2026 and Fuel. Smart calorie tracker on October 23, 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.*