# Imperium Digital Network vs QI Calculator

The clearest difference is in-app purchases: Imperium Digital Network at none against QI Calculator's 2. Imperium Digital Network also leads on iOS requirement (13.0 vs 15.0). QI Calculator's advantage is update cadence (every 3 weeks vs every 33 months). On price, ads and device support there is nothing between them.

Both are free to download. QI Calculator sells 2 one-off in-app purchases. Imperium Digital Network asks for nothing beyond the download.

Imperium Digital Network ships an update every 33 months, QI Calculator every 3 weeks. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Imperium Digital Network | QI Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 3 weeks** |
| Size | 89 MB | 129 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jaze Networks](https://appshunter.io/developer/1492907012) | [shouhui qi](https://appshunter.io/developer/1185710456) |

## What reviewers say

### Imperium Digital Network

[App page](https://appshunter.io/ios/app/imperium-digital-network/id1667259296)

**Features:** macOS Compatibility

**In-app purchases:** none


### QI Calculator

[App page](https://appshunter.io/ios/app/qi-calculator/id6476379861)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theme | $0.99 | one-time |
| Theme Blue Sky | $0.99 | one-time |


## Frequently asked questions

### Is Imperium Digital Network free?

Imperium Digital Network is free to download, with no in-app purchases.

### Is QI Calculator free?

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

### Do Imperium Digital Network or QI Calculator have ads?

Neither Imperium Digital Network nor QI Calculator shows ads.

### Which is updated more often, Imperium Digital Network or QI Calculator?

Imperium Digital Network ships an update every 33 months, and QI Calculator every 3 weeks. Most recently, Imperium Digital Network was updated on October 4, 2026 and QI Calculator on October 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.*