# Owlet vs eigenCalc

The clearest difference is update cadence: eigenCalc at monthly against Owlet's every 5 months. Owlet's advantage is iOS requirement (12.0 vs 15.5). 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.

Owlet ships an update every 5 months, eigenCalc monthly. The most recent releases landed on June 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Owlet | eigenCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Size | 123 MB | 2 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPad, Mac | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [BirdBrain Technologies LLC](https://appshunter.io/developer/1012525349) | [Luis Acevedo-Arreguin](https://appshunter.io/developer/1642773653) |

## What reviewers say

### Owlet

[App page](https://appshunter.io/ios/app/owlet-cube6/id1540127271)

**In-app purchases:** none


### eigenCalc

[App page](https://appshunter.io/ios/app/eigencalc/id6503222785)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Owlet free?

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

### Is eigenCalc free?

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

### Do Owlet or eigenCalc have ads?

Neither Owlet nor eigenCalc shows ads.

### Which is updated more often, Owlet or eigenCalc?

Owlet ships an update every 5 months, and eigenCalc monthly. Most recently, Owlet was updated on June 11, 2026 and eigenCalc on September 17, 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.*