# OneCal Calorie Tracker vs Nudge

The clearest difference is in-app purchases: OneCal Calorie Tracker at none against Nudge's 1. Nudge's advantage is ads (none vs shown) and iOS requirement (15.1 vs 18.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Nudge sells 1 in-app purchase, starting at $9.99 per month. OneCal Calorie Tracker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OneCal Calorie Tracker against 5.0 for Nudge. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

OneCal Calorie Tracker ships an update every 9 days, Nudge every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OneCal Calorie Tracker | Nudge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/onecal-calorie-tracker/id6753773780/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/nudge-calorie-tracker/id6761671989/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | **Ad-supported** | Freemium |
| Size | 5 MB | 44 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marcus Spitzmiller](https://appshunter.io/developer/1844961002) | [Jordan Rivera](https://appshunter.io/developer/1869582987) |

## 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


### Nudge

[App page](https://appshunter.io/ios/app/nudge-calorie-tracker/id6761671989)

Easily track your calorie intake by simply taking a photo of your meal. Get instant nutrition estimates and personalized daily targets. An AI coach provides guidance and support to help you reach your weight goals.

**Highlights:** Photo meal logging, AI-driven calorie and macro estimation, Smart daily calorie targets, Weight tracking and trend analysis, AI coaching for meal guidance, Private data storage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nudge Pro | $9.99 | per month |


## Frequently asked questions

### Is OneCal Calorie Tracker free?

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

### Is Nudge free?

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

### Which has better reviews, OneCal Calorie Tracker or Nudge?

OneCal Calorie Tracker and Nudge are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do OneCal Calorie Tracker or Nudge have ads?

OneCal Calorie Tracker shows ads; Nudge does not.

### Which is updated more often, OneCal Calorie Tracker or Nudge?

OneCal Calorie Tracker ships an update every 9 days, and Nudge every 2 weeks. Most recently, OneCal Calorie Tracker was updated on October 28, 2026 and Nudge 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.*