# Flashside vs Underline

The clearest difference is iOS requirement: Underline at 10.0 against Flashside's 16.0. 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.

Flashside ships an update every 6 weeks, Underline every 2 months. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Flashside | Underline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flashside/id1518971790/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 43 MB | 40 MB |
| Requires iOS | 16.0 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CQUELLE GmbH](https://appshunter.io/developer/1457513606) | [Damian Skoneczny](https://appshunter.io/developer/1571773061) |

## What reviewers say

### Flashside

[App page](https://appshunter.io/ios/app/flashside/id1518971790)

Create, study, and master any subject with this free flashcard application. It offers offline access, custom deck creation, and smart review features to enhance learning and retention for students and lifelong learners.

**Highlights:** Create custom flashcards, Study offline, Smart review modes, Multi-subject support, 100% free, no ads or subscriptions

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

**In-app purchases:** none


### Underline

[App page](https://appshunter.io/ios/app/underline-language-learning/id1571773059)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flashside free?

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

### Is Underline free?

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

### Do Flashside or Underline have ads?

Neither Flashside nor Underline shows ads.

### Which is updated more often, Flashside or Underline?

Flashside ships an update every 6 weeks, and Underline every 2 months. Most recently, Flashside was updated on September 10, 2026 and Underline on September 9, 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.*