# BrainCell | Flashcards & Study vs Otso

The clearest difference is price: BrainCell | Flashcards & Study at Free against Otso's $0.99. BrainCell | Flashcards & Study also leads on iOS requirement (16.0 vs 18.0). Otso's advantage is in-app purchases (none vs 4) and device support (4 vs 2). On update cadence and ads there is nothing between them.

BrainCell | Flashcards & Study is free to download; Otso costs $0.99 up front. BrainCell | Flashcards & Study sells 4 in-app purchases, starting at $3.99 per month. Otso asks for nothing beyond the download.

BrainCell | Flashcards & Study ships an update every 2 weeks, Otso every 3 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | BrainCell | Flashcards & Study | Otso |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/otso-visual-timer/id6778631652/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | — | Paid |
| Size | 239 MB | 5 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [VisionByte GmbH](https://appshunter.io/developer/1819908094) | [SIMON HEUSCHKEL](https://appshunter.io/developer/1863285023) |

## What reviewers say

### BrainCell | Flashcards & Study

[App page](https://appshunter.io/ios/app/braincell-flashcards-and-study/id6747115684)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrainCell Premium \| 1 Month | $3.99 | per month |
| BrainCell Premium \| 3 Months | $8.99 | per 3 months |
| BrainCell Premium \| 1 Year | $24.99 | per year |
| BrainCell Premium \| Lifetime | $49.99 | one-time |


### Otso

[App page](https://appshunter.io/ios/app/otso-visual-timer/id6778631652)

This app provides a visual countdown timer that uses a shrinking colored wedge instead of numbers. It offers various aesthetic designs and tactile feedback, making time management intuitive for all ages. The app is designed for privacy with no accounts or data collection.

**Highlights:** Visual countdown wedge, Customizable faces and sounds, Dynamic Island and Lock Screen integration, No ads or subscriptions, Private by design, Tactile feedback and animations

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BrainCell | Flashcards & Study free?

BrainCell | Flashcards & Study is free to download, with in-app purchases available.

### Is Otso free?

Otso costs $0.99, with no in-app purchases.

### Do BrainCell | Flashcards & Study or Otso have ads?

Neither BrainCell | Flashcards & Study nor Otso shows ads.

### Which is updated more often, BrainCell | Flashcards & Study or Otso?

BrainCell | Flashcards & Study ships an update every 2 weeks, and Otso every 3 weeks. Most recently, BrainCell | Flashcards & Study was updated on September 28, 2026 and Otso on October 11, 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.*