# Atom vs BunBun

The clearest difference is iOS requirement: BunBun at 11.0 against Atom's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Atom ships an update every 2 months, BunBun every 6 weeks. The most recent releases landed on June 3, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Atom | BunBun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/atom/id1418360229/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 80 MB | 64 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Edgar Barba](https://appshunter.io/developer/1418360228) | [Servicios Integrales Rugarc S.A. de C.V.](https://appshunter.io/developer/1754759910) |

## What reviewers say

### Atom

[App page](https://appshunter.io/ios/app/atom/id1418360229)

This platform helps fitness centers attract and retain clients by creating measurable goals and challenges. It enables personalized routine creation, real-time progress tracking with smart devices, and automated check-ins. Users can sync data with Apple Health for more accurate insights.

**Highlights:** Client acquisition and retention tools, Goal and challenge creation, Real-time progress tracking, Personalized routine builder, Automated check-ins, Apple Health integration

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### BunBun

[App page](https://appshunter.io/ios/app/bunbun/id6502528876)

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

**In-app purchases:** none


## Frequently asked questions

### Is Atom free?

Atom is free to download, with no in-app purchases.

### Is BunBun free?

BunBun is free to download, with no in-app purchases.

### Do Atom or BunBun have ads?

Neither Atom nor BunBun shows ads.

### Which is updated more often, Atom or BunBun?

Atom ships an update every 2 months, and BunBun every 6 weeks. Most recently, Atom was updated on June 3, 2026 and BunBun on September 16, 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.*