# SuperMemo vs OpenDay

The clearest difference is in-app purchases: OpenDay at none against SuperMemo's 10. SuperMemo's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.5). On price, update cadence and ads there is nothing between them.

Both are free to download. SuperMemo sells 10 in-app purchases, starting at $9.99 per month. OpenDay asks for nothing beyond the download.

SuperMemo ships an update every 4 weeks, OpenDay fortnightly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SuperMemo | OpenDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (132 ratings)](https://appshunter.io/ios/app/supermemo-effective-learning/id982498980/reviews)** | — |
| Number of ratings | **132** | — |
| Positive reviews | 31.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 12 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SuperMemo World](https://appshunter.io/developer/326593746) | [OpenDay.io](https://appshunter.io/developer/1872768739) |

## What reviewers say

### SuperMemo

[App page](https://appshunter.io/ios/app/supermemo-effective-learning/id982498980)

Master new languages and subjects with AI-powered spaced repetition. Practice conversations, get instant translations, and access a vast library of courses. Learn effectively, even offline, with intelligent review schedules.

**Highlights:** Spaced repetition algorithm, AI-powered conversation practice, AI voice translation, Extensive course catalog, Offline learning option, Customizable flashcards

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SuperMemo.com Premium | $9.99 | per month |
| Premium Subscription 12 months | $99.99 | per year |
| German Grammar Repertory | $29.90 | one-time |
| Portuguese: Fast Track | $39.90 | one-time |
| Biznesowy niemiecki.Słownictwo | $39.90 | one-time |
| Romanian: Fast Track | $39.99 | one-time |
| Italian Megaset 10-in-1 | $149.99 | one-time |
| Spanish Megaset 15-in-1 | $219.99 | one-time |
| French Megaset 17-in-1 | $229.99 | one-time |
| German Megaset 18-in-1 | $249.99 | one-time |

**What reviewers like**

- 👍 Excellent for long-term retention
- 👍 Highly recommended for language learning
- 👍 Offline mode appreciated (when available)
- 👍 Mature learning database/tool
- 👍 Content is top-notch

**What reviewers complain about**

- 🐛 App frequently crashes or doesn't start
- 🐛 No way to test without trial/signup
- 🐛 Cannot connect to App Store
- 🐛 Purchased courses disappeared after update
- 🐛 Website not working correctly

**Reported bugs**

- App doesn't start on iPhone 13 Pro
- Purchased courses disappeared after update
- Website not working correctly
- No longer works offline
- Slower online performance

**Requested features**

- Option to switch back to old font
- Fix search to allow searching for accented characters
- Improve TTS to respect punctuation and spacing
- Improve course editor to display cards with lots of text
- Add Apple Sign In


### OpenDay

[App page](https://appshunter.io/ios/app/openday/id6758405162)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SuperMemo free?

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

### Is OpenDay free?

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

### Do SuperMemo or OpenDay have ads?

Neither SuperMemo nor OpenDay shows ads.

### Which is updated more often, SuperMemo or OpenDay?

SuperMemo ships an update every 4 weeks, and OpenDay fortnightly. Most recently, SuperMemo was updated on November 1, 2026 and OpenDay on November 5, 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.*