# Goldbach's Conjecture vs Owlet

The clearest difference is price: Owlet at Free against Goldbach's Conjecture's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Owlet is free to download; Goldbach's Conjecture costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Goldbach's Conjecture ships an update every 8 months, Owlet every 4 months. Both last shipped on September 16, 2026.

## The numbers

| Metric | Goldbach's Conjecture | Owlet |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Size | 34 MB | 123 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad, Mac | iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [BirdBrain Technologies LLC](https://appshunter.io/developer/1012525349) |

## What reviewers say

### Goldbach's Conjecture

[App page](https://appshunter.io/ios/app/goldbachs-conjecture/id1385243580)

**In-app purchases:** none


### Owlet

[App page](https://appshunter.io/ios/app/owlet-glowpix/id1547818921)

**In-app purchases:** none


## Frequently asked questions

### Is Goldbach's Conjecture free?

Goldbach's Conjecture costs $0.99, with no in-app purchases.

### Is Owlet free?

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

### Do Goldbach's Conjecture or Owlet have ads?

Neither Goldbach's Conjecture nor Owlet shows ads.

### Which is updated more often, Goldbach's Conjecture or Owlet?

Goldbach's Conjecture ships an update every 8 months, and Owlet every 4 months. Most recently, Goldbach's Conjecture was updated on September 16, 2026 and Owlet on September 16, 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.*