# Cornerstone Cards vs Rub Memo

The clearest difference is update cadence: Rub Memo at every 6 days against Cornerstone Cards's every 3 weeks. Cornerstone Cards's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Cornerstone Cards ships an update every 3 weeks, Rub Memo every 6 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Cornerstone Cards | Rub Memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cornerstone-cards/id6526466459/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Free | Free |
| Size | 21 MB | 14 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Hicks](https://appshunter.io/developer/538725021) | [seiji honda](https://appshunter.io/developer/1896430544) |

## What reviewers say

### Cornerstone Cards

[App page](https://appshunter.io/ios/app/cornerstone-cards/id6526466459)

This app helps trading card enthusiasts and sellers capture high-quality images of cards and their corners. It streamlines the process of showcasing card condition, enabling sellers to generate professional photos that build buyer trust.

**Highlights:** High-quality card image capture, Focus on card corners, Streamlines condition showcasing, Professional photo generation, Builds buyer trust

**Features:** macOS Compatibility

**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 Cornerstone Cards free?

Cornerstone Cards 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 Cornerstone Cards or Rub Memo have ads?

Neither Cornerstone Cards nor Rub Memo shows ads.

### Which is updated more often, Cornerstone Cards or Rub Memo?

Cornerstone Cards ships an update every 3 weeks, and Rub Memo every 6 days. Most recently, Cornerstone Cards was updated on October 30, 2026 and Rub Memo on October 31, 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.*