# Cable Calc vs Certly

The clearest difference is price: Certly at Free against Cable Calc's $14.99. Certly also leads on update cadence (every 8 days vs every 4 months). Cable Calc's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.0). On ads and device support there is nothing between them.

Certly is free to download; Cable Calc costs $14.99 up front. Certly sells 2 in-app purchases, starting at $19.99 per month. Cable Calc asks for nothing beyond the download.

Cable Calc ships an update every 4 months, Certly every 8 days. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Cable Calc | Certly |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 8 days** |
| Monetization | Paid | — |
| Size | 3 MB | 41 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Certly](https://appshunter.io/developer/6773146065) |

## What reviewers say

### Cable Calc

[App page](https://appshunter.io/ios/app/cable-calc/id1044306956)

Calculate the minimum required cable size for single and three-phase circuits based on BS 7671 standards. Input design criteria, installation methods, and environmental factors to determine appropriate cable dimensions. Save or print detailed results for your projects.

**Highlights:** Calculate single and three-phase radial circuits, Calculate single-phase ring final circuits, Based on BS 7671 standards, Enter design criteria, Select cable type, installation method, ambient temperature, and grouping, Save or print results, Add circuit and client details

**Features:** macOS Compatibility

**In-app purchases:** none


### Certly

[App page](https://appshunter.io/ios/app/certly/id6773146063)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Certly Pro - Monthly | $19.99 | per month |
| Certly Pro - Annual | $199.99 | per year |


## Frequently asked questions

### Is Cable Calc free?

Cable Calc costs $14.99, with no in-app purchases.

### Is Certly free?

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

### Do Cable Calc or Certly have ads?

Neither Cable Calc nor Certly shows ads.

### Which is updated more often, Cable Calc or Certly?

Cable Calc ships an update every 4 months, and Certly every 8 days. Most recently, Cable Calc was updated on October 14, 2026 and Certly on October 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.*