# Peek vs FlashStacks

The clearest difference is update cadence: FlashStacks at weekly against Peek's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Peek sells 2 in-app purchases, starting at $4.99 per month and FlashStacks sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Peek ships an update every 3 weeks, FlashStacks weekly. The most recent releases landed on September 27, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Peek | FlashStacks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (8 ratings)](https://appshunter.io/ios/app/flashstacks-flashcard-study/id6762071988/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 27 MB | 10 MB |
| Requires iOS | 18.2 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Melvyn Hoarau](https://appshunter.io/developer/1880600559) | [Bailey Skewes](https://appshunter.io/developer/1892771018) |

## What reviewers say

### Peek

[App page](https://appshunter.io/ios/app/peek-learn-language-passively/id6759779792)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peek+ Monthly | $4.99 | per month |
| Peek+ Annual | $29.99 | per year |


### FlashStacks

[App page](https://appshunter.io/ios/app/flashstacks-flashcard-study/id6762071988)

Transform study materials into interactive Home Screen widgets. AI generates flashcards from PDFs, and spaced repetition optimizes learning. Visualize concepts with image occlusion and track progress with detailed stats.

**Highlights:** Home and Lock Screen widgets, AI-powered PDF to flashcard generation, Spaced repetition learning, Image occlusion cards, Progress tracking and stats, Customizable widget themes

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlashStacks Premium — Monthly | $4.99 | per month |
| Premium Special Offer | $24.99 | per year |
| FlashStacks Premium — Annual | $39.99 | per year |


## Frequently asked questions

### Is Peek free?

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

### Is FlashStacks free?

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

### Do Peek or FlashStacks have ads?

Neither Peek nor FlashStacks shows ads.

### Which is updated more often, Peek or FlashStacks?

Peek ships an update every 3 weeks, and FlashStacks weekly. Most recently, Peek was updated on September 27, 2026 and FlashStacks on October 12, 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.*