# 忘却曲線スケジュール vs ESAT Prep

The clearest difference is iOS requirement: 忘却曲線スケジュール at 15.0 against ESAT Prep's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 忘却曲線スケジュール sells 4 in-app purchases, starting at $1.99 per month and ESAT Prep sells 2 in-app purchases, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 忘却曲線スケジュール | ESAT Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 12 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PIXCLOWN CO., LTD.](https://appshunter.io/developer/1825514980) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### 忘却曲線スケジュール

[App page](https://appshunter.io/ios/app/id6751126403)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Personal 月額プラン | $1.99 | per month |
| Pro 月額プラン | $5.99 | per month |
| Personal 年額プラン | $19.99 | per year |
| Pro 年額プラン | $59.99 | per year |


### ESAT Prep

[App page](https://appshunter.io/ios/app/esat-prep/id6793019077)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Premium | $19.99 | per year |
| Lifetime Access | $34.99 | one-time |


## Frequently asked questions

### Is 忘却曲線スケジュール free?

忘却曲線スケジュール is free to download, with in-app purchases available.

### Is ESAT Prep free?

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

### Do 忘却曲線スケジュール or ESAT Prep have ads?

Neither 忘却曲線スケジュール nor ESAT Prep shows ads.

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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.*