# Forgetting Curve Reminder vs 進数ノック

The clearest difference is price: 進数ノック at Free against Forgetting Curve Reminder's $1.99. 進数ノック also leads on update cadence (daily vs every 5 days). Forgetting Curve Reminder's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

進数ノック is free to download; Forgetting Curve Reminder costs $1.99 up front. 進数ノック sells 1 one-off in-app purchase. Forgetting Curve Reminder asks for nothing beyond the download.

Forgetting Curve Reminder ships an update every 5 days, 進数ノック daily. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Forgetting Curve Reminder | 進数ノック |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Paid | — |
| Size | 3 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Manabi Mate LLC](https://appshunter.io/developer/1817627045) | [Hikaru Hakata](https://appshunter.io/developer/6796209163) |

## What reviewers say

### Forgetting Curve Reminder

[App page](https://appshunter.io/ios/app/forgetting-curve-reminder/id6760619904)

This app helps you remember what you learn by scheduling reviews based on the Ebbinghaus forgetting curve. Create study items, receive timely reminders, and track your progress with ease. All your data is stored locally for enhanced privacy.

**Highlights:** Scientific review scheduling, Local reminders, Progress tracking, One-tap completion, Review history, Customizable intervals

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

**In-app purchases:** none


### 進数ノック

[App page](https://appshunter.io/ios/app/radixdrill/id6796209161)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | one-time |


## Frequently asked questions

### Is Forgetting Curve Reminder free?

Forgetting Curve Reminder costs $1.99, with no in-app purchases.

### Is 進数ノック free?

進数ノック is free to download, with in-app purchases available.

### Do Forgetting Curve Reminder or 進数ノック have ads?

Neither Forgetting Curve Reminder nor 進数ノック shows ads.

### Which is updated more often, Forgetting Curve Reminder or 進数ノック?

Forgetting Curve Reminder ships an update every 5 days, and 進数ノック daily. Most recently, Forgetting Curve Reminder was updated on October 25, 2026 and 進数ノック on October 19, 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.*