# Calorie Calculator vs Onefast

The clearest difference is ads: Onefast at none against Calorie Calculator's shown. Onefast also leads on update cadence (every 2 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Calorie Calculator sells 1 one-off in-app purchase and Onefast sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

Calorie Calculator ships an update monthly, Onefast every 2 days. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Calorie Calculator | Onefast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 days** |
| Size | 7 MB | 4 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Do Tri](https://appshunter.io/developer/846531282) | [Nguyen Dinh Chung](https://appshunter.io/developer/6805296065) |

## What reviewers say

### Calorie Calculator

[App page](https://appshunter.io/ios/app/calorie-calculator-tdee/id6762194404)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Onefast

[App page](https://appshunter.io/ios/app/onefast-fasting-timer/id6810987516)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Onefast Pro (Yearly) | $9.99 | per year |
| Onefast Pro (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is Calorie Calculator free?

Calorie Calculator is free to download, with in-app purchases available.

### Is Onefast free?

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

### Do Calorie Calculator or Onefast have ads?

Calorie Calculator shows ads; Onefast does not.

### Which is updated more often, Calorie Calculator or Onefast?

Calorie Calculator ships an update monthly, and Onefast every 2 days. Most recently, Calorie Calculator was updated on October 14, 2026 and Onefast on October 4, 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.*