# Expressio Calculator vs Writers Studio

The clearest difference is in-app purchases: Expressio Calculator at none against Writers Studio's 9. Writers Studio's advantage is update cadence (every 2 weeks vs every 21 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Writers Studio sells 9 in-app purchases, starting at $9.99 per month. Expressio Calculator asks for nothing beyond the download.

Expressio Calculator ships an update every 21 months, Writers Studio every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Expressio Calculator | Writers Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 weeks** |
| Size | 2 MB | 19 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Manfred Wittmann](https://appshunter.io/developer/1505070614) | [Joshua Cavell](https://appshunter.io/developer/1490896505) |

## What reviewers say

### Expressio Calculator

[App page](https://appshunter.io/ios/app/expressio-calculator/id1505070615)

**In-app purchases:** none


### Writers Studio

[App page](https://appshunter.io/ios/app/writers-studio/id6758063563)

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud AI Basic Monthly | $9.99 | per month |
| Cloud AI Pro Monthly | $19.99 | per month |
| Cloud AI Premium Monthly | $49.99 | per month |
| Cloud AI Basic Annual | $79.99 | per year |
| Cloud AI Pro Annual | $159.99 | per year |
| Cloud AI Premium Annual | $399.99 | per year |
| AI Credits — Small | $2.99 | one-time |
| AI Credits — Medium | $5.99 | one-time |
| AI Credits — Large | $9.99 | one-time |


## Frequently asked questions

### Is Expressio Calculator free?

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

### Is Writers Studio free?

Writers Studio is free to download, with in-app purchases available.

### Do Expressio Calculator or Writers Studio have ads?

Neither Expressio Calculator nor Writers Studio shows ads.

### Which is updated more often, Expressio Calculator or Writers Studio?

Expressio Calculator ships an update every 21 months, and Writers Studio every 2 weeks. Most recently, Expressio Calculator was updated on October 25, 2026 and Writers Studio 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.*