# Protogramma ProtoMobile vs Calculus +

The clearest difference is update cadence: Calculus + at daily against Protogramma ProtoMobile's monthly. On price, ads, in-app purchases and device support there is nothing between them.

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

Protogramma ProtoMobile ships an update monthly, Calculus + daily. The most recent releases landed on September 12, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Protogramma ProtoMobile | Calculus + |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 300 MB | 8 MB |
| Requires iOS | **14.2** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Protogramma Informatics single member P.C.](https://appshunter.io/developer/1738048426) | [KeoGlobal](https://appshunter.io/developer/1708575837) |

## What reviewers say

### Protogramma ProtoMobile

[App page](https://appshunter.io/ios/app/protogramma-protomobile/id6480063071)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculus +

[App page](https://appshunter.io/ios/app/calculus-plus/id6746851592)

**In-app purchases:** none


## Frequently asked questions

### Is Protogramma ProtoMobile free?

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

### Is Calculus + free?

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

### Do Protogramma ProtoMobile or Calculus + have ads?

Neither Protogramma ProtoMobile nor Calculus + shows ads.

### Which is updated more often, Protogramma ProtoMobile or Calculus +?

Protogramma ProtoMobile ships an update monthly, and Calculus + daily. Most recently, Protogramma ProtoMobile was updated on September 12, 2026 and Calculus + on September 18, 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.*