# True Random Numbers vs ResiCalc

The clearest difference is in-app purchases: ResiCalc at none against True Random Numbers's 1. ResiCalc also leads on ads (none vs shown). True Random Numbers's advantage is update cadence (every 2 days vs every 9 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. True Random Numbers sells 1 one-off in-app purchase. ResiCalc asks for nothing beyond the download.

True Random Numbers ships an update every 2 days, ResiCalc every 9 months. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | True Random Numbers | ResiCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 9 months |
| Size | 5 MB | 4 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Frank Buss](https://appshunter.io/developer/1555803140) | [光浩 李](https://appshunter.io/developer/1576352133) |

## What reviewers say

### True Random Numbers

[App page](https://appshunter.io/ios/app/true-random-numbers/id6744599442)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### ResiCalc

[App page](https://appshunter.io/ios/app/resicalc-resistor-networks/id6757947341)

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

**In-app purchases:** none


## Frequently asked questions

### Is True Random Numbers free?

True Random Numbers is free to download, with in-app purchases available.

### Is ResiCalc free?

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

### Do True Random Numbers or ResiCalc have ads?

True Random Numbers shows ads; ResiCalc does not.

### Which is updated more often, True Random Numbers or ResiCalc?

True Random Numbers ships an update every 2 days, and ResiCalc every 9 months. Most recently, True Random Numbers was updated on November 8, 2026 and ResiCalc on November 5, 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.*