# Brain Frog vs Crimson Legion

The clearest difference is rating: Crimson Legion at 4.0 against Brain Frog's 3.0. Crimson Legion also leads on in-app purchases (none vs 3) and iOS requirement (15.1 vs 18.6). Brain Frog's advantage is update cadence (weekly vs every 2 weeks). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Brain Frog sells 3 one-off in-app purchases. Crimson Legion asks for nothing beyond the download.

Crimson Legion holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Brain Frog ships an update weekly, Crimson Legion every 2 weeks. The most recent releases landed on October 9, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Brain Frog | Crimson Legion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/brain-frog-brain-training/id6755528165/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/crimson-legion-idle/id6758132842/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 204 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Lookastic OU](https://appshunter.io/developer/1115190947) | [Jian Zellner](https://appshunter.io/developer/1871094714) |

## What reviewers say

### Brain Frog

[App page](https://appshunter.io/ios/app/brain-frog-brain-training/id6755528165)

Engage in a unique brain training experience disguised as a humorous frog boxing game. This app challenges you to break automatic behaviors and build flexibility under pressure by staying unpredictable in your actions.

**Highlights:** Hilarious frog boxing game, Unique cognitive training, Breaks automatic behaviors, Builds flexibility under pressure, Rewires neural pathways, Unpredictable gameplay

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 coins | $0.99 | one-time |
| 2500 coins | $2.99 | one-time |
| 5000 coins | $4.99 | one-time |


### Crimson Legion

[App page](https://appshunter.io/ios/app/crimson-legion-idle/id6758132842)

Assemble a powerful legion of warriors in this dark fantasy idle RPG. Tap, idle, and optimize your damage with specialized units and a deep progression system. Watch your numbers grow as you push through stages and gain permanent power boosts.

**Highlights:** Tap + Idle hybrid combat, Build and upgrade legions, Specialized unit roles, Elemental damage, Offline rewards, Prestige system

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

**In-app purchases:** none


## Frequently asked questions

### Is Brain Frog free?

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

### Is Crimson Legion free?

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

### Which has better reviews, Brain Frog or Crimson Legion?

Crimson Legion is rated higher. Brain Frog averages 3.0 out of 5 from 2 ratings, while Crimson Legion averages 4.0 from 4 ratings.

### Do Brain Frog or Crimson Legion have ads?

Neither Brain Frog nor Crimson Legion shows ads.

### Which is updated more often, Brain Frog or Crimson Legion?

Brain Frog ships an update weekly, and Crimson Legion every 2 weeks. Most recently, Brain Frog was updated on October 9, 2026 and Crimson Legion on October 23, 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.*