# Deck Lens vs Flash

The clearest difference is in-app purchases: Deck Lens at none against Flash's 2. Deck Lens also leads on device support (3 vs 1). Flash's advantage is ads (none vs shown). On price and iOS requirement there is nothing between them.

Both are free to download. Flash sells 2 in-app purchases, starting at $2.99 per month. Deck Lens asks for nothing beyond the download.

## The numbers

| Metric | Deck Lens | Flash |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | — |
| Size | 43 MB | 26 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Kadir Caner Ergun](https://appshunter.io/developer/1883801098) | [AlleyApp](https://appshunter.io/developer/1564711264) |

## What reviewers say

### Deck Lens

[App page](https://appshunter.io/ios/app/deck-lens/id6760315121)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flash

[App page](https://appshunter.io/ios/app/flash-spaced-repetition/id6815572568)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flash Unlimited Monthly | $2.99 | per month |
| Flash Unlimited Yearly | $12.99 | per year |


## Frequently asked questions

### Is Deck Lens free?

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

### Is Flash free?

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

### Do Deck Lens or Flash have ads?

Deck Lens shows ads; Flash does not.

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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.*