# Forgetting Curve Reminder vs 忘却曲線

The clearest difference is price: 忘却曲線 at Free against Forgetting Curve Reminder's $1.99. 忘却曲線 also leads on device support (3 vs 1) and iOS requirement (15.5 vs 17.0). On update cadence, ads and in-app purchases there is nothing between them.

忘却曲線 is free to download; Forgetting Curve Reminder costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Forgetting Curve Reminder ships an update every 4 days, 忘却曲線 every 5 days. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Forgetting Curve Reminder | 忘却曲線 |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Paid | — |
| Size | 4 MB | 94 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Manabi Mate LLC](https://appshunter.io/developer/1817627045) | [Mitsuo Watabe](https://appshunter.io/developer/6788107915) |

## What reviewers say

### Forgetting Curve Reminder

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

This app uses spaced repetition based on the forgetting curve to help you remember what you learn. It schedules reviews and sends timely notifications to ensure you don't miss important study sessions. Track your progress and review history with visual charts.

**Highlights:** Spaced repetition scheduling, Customizable review reminders, Overdue and second reminder options, Progress tracking and history, Visual forgetting curve charts, Customizable categories, iCloud synchronization

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

**In-app purchases:** none


### 忘却曲線

[App page](https://appshunter.io/ios/app/id6799765993)

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

**In-app purchases:** none


## Frequently asked questions

### Is Forgetting Curve Reminder free?

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

### Is 忘却曲線 free?

忘却曲線 is free to download, with no in-app purchases.

### Do Forgetting Curve Reminder or 忘却曲線 have ads?

Neither Forgetting Curve Reminder nor 忘却曲線 shows ads.

### Which is updated more often, Forgetting Curve Reminder or 忘却曲線?

Forgetting Curve Reminder ships an update every 4 days, and 忘却曲線 every 5 days. Most recently, Forgetting Curve Reminder was updated on November 9, 2026 and 忘却曲線 on November 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.*