# my11c vs CalcStak

The clearest difference is update cadence: my11c at every 3 weeks against CalcStak's every 5 months. my11c also leads on device support (3 vs 1). CalcStak's advantage is iOS requirement (17.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. my11c sells 1 one-off in-app purchase and CalcStak sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

my11c ships an update every 3 weeks, CalcStak every 5 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | my11c | CalcStak |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Size | 10 MB | 1 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Perovic](https://appshunter.io/developer/400748424) | [JOEL ANDREW ROSINBUM](https://appshunter.io/developer/1896305700) |

## What reviewers say

### my11c

[App page](https://appshunter.io/ios/app/my11c/id6762810891)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full App | $9.99 | one-time |


### CalcStak

[App page](https://appshunter.io/ios/app/calcstak/id6766592809)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Functions | $2.99 | one-time |


## Frequently asked questions

### Is my11c free?

my11c is free to download, with in-app purchases available.

### Is CalcStak free?

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

### Do my11c or CalcStak have ads?

Neither my11c nor CalcStak shows ads.

### Which is updated more often, my11c or CalcStak?

my11c ships an update every 3 weeks, and CalcStak every 5 months. Most recently, my11c was updated on October 24, 2026 and CalcStak on October 28, 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.*