# Hypomnema vs Surface Explorer

The clearest difference is in-app purchases: Surface Explorer at none against Hypomnema's 2. Surface Explorer also leads on ads (none vs shown) and device support (3 vs 1). Hypomnema's advantage is update cadence (daily vs every 2 weeks). On price and iOS requirement there is nothing between them.

Both are free to download. Hypomnema sells 2 in-app purchases, starting at $0.99 per month. Surface Explorer asks for nothing beyond the download.

Hypomnema ships an update daily, Surface Explorer every 2 weeks. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Hypomnema | Surface Explorer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 2 weeks |
| Size | 11 MB | 62 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Efe Ertekin](https://appshunter.io/developer/1731427722) | [GAETANO MOSCHETTI](https://appshunter.io/developer/6787015299) |

## What reviewers say

### Hypomnema

[App page](https://appshunter.io/ios/app/hypomnema-flashcard/id6742754303)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |
| Premium | $3.99 | per year |


### Surface Explorer

[App page](https://appshunter.io/ios/app/surface-explorer/id6787015297)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Hypomnema free?

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

### Is Surface Explorer free?

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

### Do Hypomnema or Surface Explorer have ads?

Hypomnema shows ads; Surface Explorer does not.

### Which is updated more often, Hypomnema or Surface Explorer?

Hypomnema ships an update daily, and Surface Explorer every 2 weeks. Most recently, Hypomnema was updated on October 25, 2026 and Surface Explorer on October 21, 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.*