# Forgetting Curve Reminder vs VPO

The clearest difference is price: VPO at Free against Forgetting Curve Reminder's $1.99. VPO also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On update cadence, ads and in-app purchases there is nothing between them.

VPO 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, VPO every 3 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Forgetting Curve Reminder | VPO |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Paid | — |
| Size | 3 MB | 31 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Manabi Mate LLC](https://appshunter.io/developer/1817627045) | [Digital Knowledge Co.,Ltd.](https://appshunter.io/developer/809208459) |

## 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


### VPO

[App page](https://appshunter.io/ios/app/vpo/id6789568464)

**Features:** 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 VPO free?

VPO is free to download, with no in-app purchases.

### Do Forgetting Curve Reminder or VPO have ads?

Neither Forgetting Curve Reminder nor VPO shows ads.

### Which is updated more often, Forgetting Curve Reminder or VPO?

Forgetting Curve Reminder ships an update every 4 days, and VPO every 3 days. Most recently, Forgetting Curve Reminder was updated on October 31, 2026 and VPO on October 28, 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.*