# IPST Catalog vs Calligraphy & Learn to write

The clearest difference is in-app purchases: IPST Catalog at none against Calligraphy & Learn to write's 3. IPST Catalog also leads on ads (none vs shown) and update cadence (every 6 months vs every 51 months). On price and device support there is nothing between them.

Both are free to download. Calligraphy & Learn to write sells 3 in-app purchases, starting at $4.99 per 7 days. IPST Catalog asks for nothing beyond the download.

IPST Catalog ships an update every 6 months, Calligraphy & Learn to write every 51 months. The most recent releases landed on May 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | IPST Catalog | Calligraphy & Learn to write |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 months** | Every 51 months |
| Size | 75 MB | 141 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Institute for the Promotion of Teaching Science and Technology (IPST)](https://appshunter.io/developer/643591471) | [Isabel Zaballos](https://appshunter.io/developer/1263380498) |

## What reviewers say

### IPST Catalog

[App page](https://appshunter.io/ios/app/ipst-catalog/id772847993)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calligraphy & Learn to write

[App page](https://appshunter.io/ios/app/calligraphy-and-learn-to-write/id1306768501)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly | $19.95 | per year |
| Remove Ads | $29.95 | one-time |


## Frequently asked questions

### Is IPST Catalog free?

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

### Is Calligraphy & Learn to write free?

Calligraphy & Learn to write is free to download, with in-app purchases available.

### Do IPST Catalog or Calligraphy & Learn to write have ads?

Calligraphy & Learn to write shows ads; IPST Catalog does not.

### Which is updated more often, IPST Catalog or Calligraphy & Learn to write?

IPST Catalog ships an update every 6 months, and Calligraphy & Learn to write every 51 months. Most recently, IPST Catalog was updated on May 16, 2026 and Calligraphy & Learn to write on September 10, 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.*