# Simple Calorie Tracker vs LeanFast

The clearest difference is iOS requirement: Simple Calorie Tracker at 18.0 against LeanFast's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Simple Calorie Tracker sells 2 in-app purchases, starting at $9.99 per month and LeanFast sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Simple Calorie Tracker ships an update every 2 days, LeanFast every 4 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Simple Calorie Tracker | LeanFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-calorie-tracker-calvin/id6790968217/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | Freemium | — |
| Size | 18 MB | 47 MB |
| Requires iOS | **18.0** | 26.1 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 12+ |
| Developer | [Kevin Miguel Estrada Garcia](https://appshunter.io/developer/6790968219) | [Hajer Trabelsi](https://appshunter.io/developer/6826828505) |

## What reviewers say

### Simple Calorie Tracker

[App page](https://appshunter.io/ios/app/simple-calorie-tracker-calvin/id6790968217)

This app uses AI to help you track your calorie and macro intake. It offers features like barcode scanning, food search, and weight tracking. It also syncs with health platforms and provides personalized insights based on your data.

**Highlights:** AI meal photo scan, Barcode scanning, Food database search, Manual macro logging, Weight tracking with trend line, Apple Health & Google Health sync, Home and Lock Screen widgets

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calvin Plus | $9.99 | per month |
| Calvin Plus Annual | $49.99 | per year |


### LeanFast

[App page](https://appshunter.io/ios/app/leanfast-intermittent-fasting/id6818318288)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prism Monthly | $3.99 | per month |
| Prism Yearly | $29.99 | per year |
| Prism Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Simple Calorie Tracker free?

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

### Is LeanFast free?

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

### Do Simple Calorie Tracker or LeanFast have ads?

Neither Simple Calorie Tracker nor LeanFast shows ads.

### Which is updated more often, Simple Calorie Tracker or LeanFast?

Simple Calorie Tracker ships an update every 2 days, and LeanFast every 4 days. Most recently, Simple Calorie Tracker was updated on October 24, 2026 and LeanFast on October 31, 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.*