# Atomic vs CIMM

The clearest difference is in-app purchases: CIMM at none against Atomic's 4. CIMM also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.0). Atomic's advantage is update cadence (every 5 days vs every 4 months). On price and ads there is nothing between them.

Both are free to download. Atomic sells 4 in-app purchases, starting at $4.99 per month. CIMM asks for nothing beyond the download.

Atomic ships an update every 5 days, CIMM every 4 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Atomic | CIMM |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 64 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chung Ping Tseng](https://appshunter.io/developer/1801222767) | [Seabird Apps](https://appshunter.io/developer/901059927) |

## What reviewers say

### Atomic

[App page](https://appshunter.io/ios/app/atomic-learn-languages/id6743085759)

This app offers daily listening challenges to improve English comprehension. It's designed to build a language habit through short, engaging exercises, catering to various levels and accents. Track your progress and maintain a streak with quick, effective practice.

**Highlights:** Daily listening challenges, AI-powered learning, Typing practice, Instant feedback, Streak tracking, Multiple accents and levels

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Atomic Learning - Monthly Plan | $4.99 | per month |
| Atomic Learning - Yearly Plan | $29.99 | per year |
| AtomicLearning Pro Lifetime | $39.99 | one-time |
| AtomicLearning Pro Lifetime | $59.99 | one-time |


### CIMM

[App page](https://appshunter.io/ios/app/cimm-montessori/id6748812224)

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

**In-app purchases:** none


## Frequently asked questions

### Is Atomic free?

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

### Is CIMM free?

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

### Do Atomic or CIMM have ads?

Neither Atomic nor CIMM shows ads.

### Which is updated more often, Atomic or CIMM?

Atomic ships an update every 5 days, and CIMM every 4 months. Most recently, Atomic was updated on November 4, 2026 and CIMM on October 30, 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.*