# reminDO vs ring つなげる知識、ひろげる輪

The clearest difference is rating: reminDO at 4.8 against ring つなげる知識、ひろげる輪's 3.3. reminDO also leads on update cadence (weekly vs monthly) and ratings volume (61 vs 4). ring つなげる知識、ひろげる輪's advantage is iOS requirement (13.0 vs 15). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. reminDO sells 11 in-app purchases, starting at $1.99 per month and ring つなげる知識、ひろげる輪 sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

reminDO holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: reminDO has 61 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 72% of reminDO's written reviews are positive against 67% of ring つなげる知識、ひろげる輪's.

reminDO ships an update weekly, ring つなげる知識、ひろげる輪 monthly. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | reminDO | ring つなげる知識、ひろげる輪 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (61 ratings)](https://appshunter.io/ios/app/remindo-ensure-knowledge/id1058865810/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/ring/id1530177505/reviews) |
| Number of ratings | **61** | 4 |
| Positive reviews | **71.6% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 78 MB | 73 MB |
| Requires iOS | 15 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [atkk](https://appshunter.io/developer/543439608) | [STARDY, K.K.](https://appshunter.io/developer/1530177507) |

## What reviewers say

### reminDO

[App page](https://appshunter.io/ios/app/remindo-ensure-knowledge/id1058865810)

This app helps you retain information by sending timely reminders before you forget it. It optimizes your study sessions based on the forgetting curve, ensuring maximum memorization with minimal effort. Easily manage your learning materials and study across multiple devices.

**Highlights:** Optimized studying based on forgetting curve, Manage 'to do' lists for learning, Study on smartphone, tablet, or PC, Memorize book/article gists, Capture and recall notes, Remember quotes and foreign language words

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Member (Monthly) | $1.99 | per month |
| Monthly + 7 Days Free | $1.99 | per month |
| Plus Member (Monthly) | $2.99 | per month |
| Plus Member (Monthly) | $4.49 | per month |
| 3 Months + 3 Days Free | $5.99 | per 3 months |
| 3 Months + 7 Days Free | $5.99 | per 3 months |
| Annual + 7 Days Free | $14.99 | per year |
| Plus Member (Yearly) | $19.99 | per year |
| Annual + 3 Days Free | $19.99 | per year |
| Annual + 7 Days Free | $19.99 | per year |
| Lifetime License | $34.99 | one-time |


### ring つなげる知識、ひろげる輪

[App page](https://appshunter.io/ios/app/ring/id1530177505)

Create and share flashcards with images, equations, and illustrations. Generate quizzes from card sets for study or friendly competition. Save and search for card sets to learn from others.

**Highlights:** Create flashcards with images, Share flashcards with others, Generate quizzes from card sets, Track study progress, Save favorite card sets, Search for card sets by genre

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ヶ月快適プラン120円 | $0.99 | per month |
| 6ヶ月快適プラン500円 | $4.49 | per 6 months |
| 1年快適プラン980円 | $8.99 | per year |

**What reviewers like**

- 👍 Simple and easy to see
- 👍 Easy to understand by grade
- 👍 Easy to memorize and study anywhere
- 👍 Can create own cards, use others'
- 👍 Best flashcard app, used for 5 years

**What reviewers complain about**

- 🐛 Slow loading and saving
- 🐛 Limited features
- 🐛 Not compatible with iPhone only
- 🐛 App crashes frequently
- 🐛 Slow startup sometimes

**Reported bugs**

- App crashes when publishing
- Saving and publishing takes over 30 minutes
- App crashes during editing
- Data lost when app crashes
- App freezes on title screen

**Requested features**

- Ability to change card order during creation
- Faster load times
- Ability to review only marked words
- Predictive text for card backs
- Ability to add cards to existing sets easily


## Frequently asked questions

### Is reminDO free?

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

### Is ring つなげる知識、ひろげる輪 free?

ring つなげる知識、ひろげる輪 is free to download, with in-app purchases available.

### Which has better reviews, reminDO or ring つなげる知識、ひろげる輪?

reminDO is rated higher. reminDO averages 4.8 out of 5 from 61 ratings, while ring つなげる知識、ひろげる輪 averages 3.3 from 4 ratings.

### Do reminDO or ring つなげる知識、ひろげる輪 have ads?

Both reminDO and ring つなげる知識、ひろげる輪 show ads.

### Which is updated more often, reminDO or ring つなげる知識、ひろげる輪?

reminDO ships an update weekly, and ring つなげる知識、ひろげる輪 monthly. Most recently, reminDO was updated on October 13, 2026 and ring つなげる知識、ひろげる輪 on October 6, 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.*