# BrainFlex! vs Bubblekick Duel

The clearest difference is in-app purchases: Bubblekick Duel at none against BrainFlex!'s 4. Bubblekick Duel also leads on ads (none vs shown) and update cadence (weekly vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. BrainFlex! sells 4 one-off in-app purchases. Bubblekick Duel asks for nothing beyond the download.

BrainFlex! ships an update every 2 weeks, Bubblekick Duel weekly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BrainFlex! | Bubblekick Duel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brainflex/id6756278321/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 113 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hila LLC](https://appshunter.io/developer/1839257488) | [Agneta-Maria Shchepilova](https://appshunter.io/developer/1882370322) |

## What reviewers say

### BrainFlex!

[App page](https://appshunter.io/ios/app/brainflex/id6756278321)

Engage in a cinematic trivia adventure that sharpens your mind with curated categories and dynamic challenges. Enjoy adaptive difficulty, immersive visuals, and audio that make daily brain training feel like a blockbuster experience. Compete with friends and unlock achievements to stay mentally agile.

**Highlights:** Cinematic trivia adventure, Curated categories, Dynamic streak challenges, Adaptive difficulty, Immersive visuals and audio, Themed achievements, Customizable focus soundtrack

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1,000 Stars | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| 5000 Stars | $3.99 | one-time |
| 10,000 Stars | $6.99 | one-time |


### Bubblekick Duel

[App page](https://appshunter.io/ios/app/bubblekick-duel-soccer-prinko/id6760022480)

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

**In-app purchases:** none


## Frequently asked questions

### Is BrainFlex! free?

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

### Is Bubblekick Duel free?

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

### Do BrainFlex! or Bubblekick Duel have ads?

BrainFlex! shows ads; Bubblekick Duel does not.

### Which is updated more often, BrainFlex! or Bubblekick Duel?

BrainFlex! ships an update every 2 weeks, and Bubblekick Duel weekly. Most recently, BrainFlex! was updated on October 30, 2026 and Bubblekick Duel on October 25, 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.*