# Delphos Mobile Client vs CALC ToolBox

The clearest difference is in-app purchases: Delphos Mobile Client at none against CALC ToolBox's 1. CALC ToolBox's advantage is update cadence (every 5 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CALC ToolBox sells 1 one-off in-app purchase. Delphos Mobile Client asks for nothing beyond the download.

Delphos Mobile Client ships an update every 6 weeks, CALC ToolBox every 5 days. Both last shipped on September 17, 2026.

## The numbers

| Metric | Delphos Mobile Client | CALC ToolBox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Size | 47 MB | 5 MB |
| Requires iOS | **16.1** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Delphos Project Services Limited](https://appshunter.io/developer/988845527) | [1BIGRIG Ltd](https://appshunter.io/developer/1792073283) |

## What reviewers say

### Delphos Mobile Client

[App page](https://appshunter.io/ios/app/delphos-mobile-client/id988845528)

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

**In-app purchases:** none


### CALC ToolBox

[App page](https://appshunter.io/ios/app/calc-toolbox/id6741718195)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Delphos Mobile Client free?

Delphos Mobile Client is free to download, with no in-app purchases.

### Is CALC ToolBox free?

CALC ToolBox is free to download, with in-app purchases available.

### Do Delphos Mobile Client or CALC ToolBox have ads?

Neither Delphos Mobile Client nor CALC ToolBox shows ads.

### Which is updated more often, Delphos Mobile Client or CALC ToolBox?

Delphos Mobile Client ships an update every 6 weeks, and CALC ToolBox every 5 days. Most recently, Delphos Mobile Client was updated on September 17, 2026 and CALC ToolBox on September 17, 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.*