# Control System Calc vs My LoopCal

The clearest difference is in-app purchases: Control System Calc at none against My LoopCal's 3. My LoopCal's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. My LoopCal sells 3 in-app purchases, starting at $1.99 per month. Control System Calc asks for nothing beyond the download.

Control System Calc ships an update every 2 months, My LoopCal every 2 weeks. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Control System Calc | My LoopCal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 9 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [洋 刘](https://appshunter.io/developer/6775317751) | [Neobile LLC](https://appshunter.io/developer/1080490647) |

## What reviewers say

### Control System Calc

[App page](https://appshunter.io/ios/app/control-system-calc/id6791956580)

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

**In-app purchases:** none


### My LoopCal

[App page](https://appshunter.io/ios/app/my-loopcal-4-20ma-calibration/id6792422682)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $4.99 | per year |
| Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is Control System Calc free?

Control System Calc is free to download, with no in-app purchases.

### Is My LoopCal free?

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

### Do Control System Calc or My LoopCal have ads?

Control System Calc shows ads; My LoopCal does not.

### Which is updated more often, Control System Calc or My LoopCal?

Control System Calc ships an update every 2 months, and My LoopCal every 2 weeks. Most recently, Control System Calc was updated on October 20, 2026 and My LoopCal on October 21, 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.*