# PSO Mobile App vs Calculator live

The clearest difference is in-app purchases: PSO Mobile App at none against Calculator live's 2. PSO Mobile App also leads on iOS requirement (13.0 vs 17.4). Calculator live's advantage is update cadence (every 2 days vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Calculator live sells 2 in-app purchases, starting at $0.99 per month. PSO Mobile App asks for nothing beyond the download.

PSO Mobile App ships an update every 10 months, Calculator live every 2 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PSO Mobile App | Calculator live |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 71 MB | 3 MB |
| Requires iOS | **13.0** | 17.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Livro Systems Incorporated](https://appshunter.io/developer/1896544025) | [Nikolai Bidzinashvili](https://appshunter.io/developer/1887808451) |

## What reviewers say

### PSO Mobile App

[App page](https://appshunter.io/ios/app/pso-mobile-app/id6503723253)

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

**In-app purchases:** none


### Calculator live

[App page](https://appshunter.io/ios/app/calculator-live/id6761106949)

This app provides an always-active calculator with a live history of all your computations. Easily edit, add notes, and copy past calculations or results. It keeps a chronological record of your work, allowing for quick retrieval and modification.

**Highlights:** Live calculation history, Edit past computations, Add notes to calculations, Copy results and equations, Organized by date, Clear history

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Open history | $0.99 | per month |
| Open history | $9.99 | per year |


## Frequently asked questions

### Is PSO Mobile App free?

PSO Mobile App is free to download, with no in-app purchases.

### Is Calculator live free?

Calculator live is free to download, with in-app purchases available.

### Do PSO Mobile App or Calculator live have ads?

Neither PSO Mobile App nor Calculator live shows ads.

### Which is updated more often, PSO Mobile App or Calculator live?

PSO Mobile App ships an update every 10 months, and Calculator live every 2 days. Most recently, PSO Mobile App was updated on October 25, 2026 and Calculator live 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.*