# 電卓 vs Rub Memo

電卓 and Rub Memo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

電卓 ships an update every 5 days, Rub Memo every 6 days. The most recent releases landed on September 27, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 電卓 | Rub Memo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 days |
| Monetization | — | Free |
| Size | 1 MB | 14 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [eisuke yoshikawa](https://appshunter.io/developer/1894588067) | [seiji honda](https://appshunter.io/developer/1896430544) |

## What reviewers say

### 電卓

[App page](https://appshunter.io/ios/app/calcnote/id6762538775)

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

**In-app purchases:** none


### Rub Memo

[App page](https://appshunter.io/ios/app/rub-memo/id6772340496)

This app allows you to erase text by rubbing your finger over it, mimicking the feel of erasing pencil on paper. It also offers a home screen widget for quick access, reordering paragraphs, and inserting various media like tables, checklists, and drawings.

**Highlights:** Erase text with finger rub, Home screen widget for notes, Reorder paragraphs by long-press and drop, Insert tables, checklists, images, and drawings, Full-text search with highlighted matches, Lock notes with Face ID/Touch ID, Export and share as PDF

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

**In-app purchases:** none


## Frequently asked questions

### Is 電卓 free?

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

### Is Rub Memo free?

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

### Do 電卓 or Rub Memo have ads?

Neither 電卓 nor Rub Memo shows ads.

### Which is updated more often, 電卓 or Rub Memo?

電卓 ships an update every 5 days, and Rub Memo every 6 days. Most recently, 電卓 was updated on September 27, 2026 and Rub Memo on September 23, 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.*