# i単語帳 vs 古文単語 Otodo 698単語 大学受験 対応

The clearest difference is price: 古文単語 Otodo 698単語 大学受験 対応 at Free against i単語帳's $1.99. 古文単語 Otodo 698単語 大学受験 対応 also leads on iOS requirement (16.2 vs 26.0). i単語帳's advantage is in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

古文単語 Otodo 698単語 大学受験 対応 is free to download; i単語帳 costs $1.99 up front. 古文単語 Otodo 698単語 大学受験 対応 sells 1 in-app purchase, starting at $3.99 per month. i単語帳 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | i単語帳 | 古文単語 Otodo 698単語 大学受験 対応 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | — |
| Size | 8 MB | 47 MB |
| Requires iOS | 26.0 | **16.2** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [aill, k.k. (JP)](https://appshunter.io/developer/293879399) | [THIRD DOOR LIMITED LIABILITY CO.](https://appshunter.io/developer/1689152883) |

## What reviewers say

### i単語帳

[App page](https://appshunter.io/ios/app/i/id515863677)

This app combines the tactile feel of physical flashcards with digital efficiency. It uses a scientific approach to optimize memorization by re-presenting cards at scientifically determined intervals. Easily manage and import your vocabulary lists for effective learning.

**Highlights:** Realistic card-flipping simulation, Automatic spaced repetition learning, Pre-loaded 600 common English words, CSV file import for bulk vocabulary entry, Cross-vocabulary search, Customizable card and text colors

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

**In-app purchases:** none


### 古文単語 Otodo 698単語 大学受験 対応

[App page](https://appshunter.io/ios/app/otodo-698/id6743691262)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otodo サブスクリプション | $3.99 | per month |


## Frequently asked questions

### Is i単語帳 free?

i単語帳 costs $1.99, with no in-app purchases.

### Is 古文単語 Otodo 698単語 大学受験 対応 free?

古文単語 Otodo 698単語 大学受験 対応 is free to download, with in-app purchases available.

### Do i単語帳 or 古文単語 Otodo 698単語 大学受験 対応 have ads?

Neither i単語帳 nor 古文単語 Otodo 698単語 大学受験 対応 shows ads.

### Which is updated more often, i単語帳 or 古文単語 Otodo 698単語 大学受験 対応?

i単語帳 ships an update every 2 months, and 古文単語 Otodo 698単語 大学受験 対応 every 2 months. Most recently, i単語帳 was updated on October 9, 2026 and 古文単語 Otodo 698単語 大学受験 対応 on October 7, 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.*