# M2go Sensor vs Calccis

The clearest difference is update cadence: Calccis at every 3 weeks against M2go Sensor's every 55 months. M2go Sensor's advantage is iOS requirement (15.6 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

M2go Sensor ships an update every 55 months, Calccis every 3 weeks. The most recent releases landed on October 6, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | M2go Sensor | Calccis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 3 weeks** |
| Size | 2 MB | 1 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [taskit](https://appshunter.io/developer/830597040) | [Jukka Aittola](https://appshunter.io/developer/1676073314) |

## What reviewers say

### M2go Sensor

[App page](https://appshunter.io/ios/app/m2go-sensor/id1166199314)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calccis

[App page](https://appshunter.io/ios/app/calccis/id6446233205)

**In-app purchases:** none


## Frequently asked questions

### Is M2go Sensor free?

M2go Sensor is free to download, with no in-app purchases.

### Is Calccis free?

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

### Do M2go Sensor or Calccis have ads?

Neither M2go Sensor nor Calccis shows ads.

### Which is updated more often, M2go Sensor or Calccis?

M2go Sensor ships an update every 55 months, and Calccis every 3 weeks. Most recently, M2go Sensor was updated on October 6, 2026 and Calccis on September 12, 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.*