# Calculus AI vs Registered Electrical Worker

The clearest difference is update cadence: Registered Electrical Worker at every 3 days against Calculus AI's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calculus AI sells 2 in-app purchases, starting at $4.99 per 7 days and Registered Electrical Worker sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Calculus AI ships an update every 4 weeks, Registered Electrical Worker every 3 days. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Calculus AI | Registered Electrical Worker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Size | 61 MB | 68 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tat Wah Chan](https://appshunter.io/developer/1832432621) | [Pickmy AI](https://appshunter.io/developer/1869516043) |

## What reviewers say

### Calculus AI

[App page](https://appshunter.io/ios/app/calculus-ai-math-solver/id6814129703)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculus AI - Smart Solver Weekly | $4.99 | per 7 days |
| Calculus AI - Smart Solver Yearly | $29.99 | per year |


### Registered Electrical Worker

[App page](https://appshunter.io/ios/app/registered-electrical-worker/id6816395453)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 90-day Pro Offer | $19.99 | one-time |
| Pro 90 Days | $22.99 | one-time |


## Frequently asked questions

### Is Calculus AI free?

Calculus AI is free to download, with in-app purchases available.

### Is Registered Electrical Worker free?

Registered Electrical Worker is free to download, with in-app purchases available.

### Do Calculus AI or Registered Electrical Worker have ads?

Neither Calculus AI nor Registered Electrical Worker shows ads.

### Which is updated more often, Calculus AI or Registered Electrical Worker?

Calculus AI ships an update every 4 weeks, and Registered Electrical Worker every 3 days. Most recently, Calculus AI was updated on November 6, 2026 and Registered Electrical Worker on November 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.*