# Collie | AI Handwriting Eraser vs Study Planner Pro

The clearest difference is update cadence: Study Planner Pro at every 2 weeks against Collie | AI Handwriting Eraser's every 6 weeks. Study Planner Pro also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Collie | AI Handwriting Eraser sells 2 in-app purchases, starting at $2.99 per month and Study Planner Pro sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Collie | AI Handwriting Eraser ships an update every 6 weeks, Study Planner Pro every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Collie | AI Handwriting Eraser | Study Planner Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 21 MB | 20 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [SOKI UCHIDA](https://appshunter.io/developer/1733660988) | [HyunJu Kim](https://appshunter.io/developer/6780143762) |

## What reviewers say

### Collie | AI Handwriting Eraser

[App page](https://appshunter.io/ios/app/collie-ai-handwriting-eraser/id6759791274)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Yearly Plan | $22.99 | per year |


### Study Planner Pro

[App page](https://appshunter.io/ios/app/study-planner-pro/id6786996270)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Planner Pro - AI 플러스 멤버쉽 | $2.99 | per month |


## Frequently asked questions

### Is Collie | AI Handwriting Eraser free?

Collie | AI Handwriting Eraser is free to download, with in-app purchases available.

### Is Study Planner Pro free?

Study Planner Pro is free to download, with in-app purchases available.

### Do Collie | AI Handwriting Eraser or Study Planner Pro have ads?

Neither Collie | AI Handwriting Eraser nor Study Planner Pro shows ads.

### Which is updated more often, Collie | AI Handwriting Eraser or Study Planner Pro?

Collie | AI Handwriting Eraser ships an update every 6 weeks, and Study Planner Pro every 2 weeks. Most recently, Collie | AI Handwriting Eraser was updated on October 25, 2026 and Study Planner Pro on October 25, 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.*