# OneCal Calorie Tracker vs Simple Weight & BMI Tracker

The clearest difference is in-app purchases: OneCal Calorie Tracker at none against Simple Weight & BMI Tracker's 1. Simple Weight & BMI Tracker's advantage is update cadence (every 4 days vs every 9 days) and iOS requirement (14.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. Simple Weight & BMI Tracker sells 1 one-off in-app purchase. OneCal Calorie Tracker asks for nothing beyond the download.

OneCal Calorie Tracker ships an update every 9 days, Simple Weight & BMI Tracker every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OneCal Calorie Tracker | Simple Weight & BMI Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/onecal-calorie-tracker/id6753773780/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 5 MB | 40 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Marcus Spitzmiller](https://appshunter.io/developer/1844961002) | [Simple Works LLC](https://appshunter.io/developer/1880967664) |

## What reviewers say

### OneCal Calorie Tracker

[App page](https://appshunter.io/ios/app/onecal-calorie-tracker/id6753773780)

This app offers a straightforward approach to tracking daily calorie intake. It focuses on simplicity, allowing users to log their food and monitor their targets without complex calculations or features. The goal is to make calorie management quick and easy, freeing up users' time.

**Highlights:** Science-based calorie tracking, No macro calculations, No barcode scanning, Fast and simple logging, View calorie targets, Focus on calories in, calories out

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Weight & BMI Tracker

[App page](https://appshunter.io/ios/app/simple-weight-and-bmi-tracker/id6759824203)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads | $8.99 | one-time |


## Frequently asked questions

### Is OneCal Calorie Tracker free?

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

### Is Simple Weight & BMI Tracker free?

Simple Weight & BMI Tracker is free to download, with in-app purchases available.

### Do OneCal Calorie Tracker or Simple Weight & BMI Tracker have ads?

Both OneCal Calorie Tracker and Simple Weight & BMI Tracker show ads.

### Which is updated more often, OneCal Calorie Tracker or Simple Weight & BMI Tracker?

OneCal Calorie Tracker ships an update every 9 days, and Simple Weight & BMI Tracker every 4 days. Most recently, OneCal Calorie Tracker was updated on October 28, 2026 and Simple Weight & BMI Tracker on October 24, 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.*