# CF Systèmes vs BuildWire Calc

The clearest difference is in-app purchases: CF Systèmes at none against BuildWire Calc's 2. CF Systèmes also leads on iOS requirement (13.0 vs 15.0). BuildWire Calc's advantage is update cadence (daily vs every 10 days). On price, ads and device support there is nothing between them.

Both are free to download. BuildWire Calc sells 2 in-app purchases, starting at $9.99 per year. CF Systèmes asks for nothing beyond the download.

CF Systèmes ships an update every 10 days, BuildWire Calc daily. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CF Systèmes | BuildWire Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Daily** |
| Size | 102 MB | 22 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Agence Cinquante5](https://appshunter.io/developer/1167490817) | [SKYSEED TECH LLC](https://appshunter.io/developer/1862035221) |

## What reviewers say

### CF Systèmes

[App page](https://appshunter.io/ios/app/cf-systemes/id6446024772)

**Features:** macOS Compatibility

**In-app purchases:** none


### BuildWire Calc

[App page](https://appshunter.io/ios/app/buildwire-calc-electrical/id6824496671)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BuildWire Pro (yearly) | $9.99 | per year |
| BuildWire Pro (lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is CF Systèmes free?

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

### Is BuildWire Calc free?

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

### Do CF Systèmes or BuildWire Calc have ads?

Neither CF Systèmes nor BuildWire Calc shows ads.

### Which is updated more often, CF Systèmes or BuildWire Calc?

CF Systèmes ships an update every 10 days, and BuildWire Calc daily. Most recently, CF Systèmes was updated on October 25, 2026 and BuildWire Calc on October 31, 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.*