# PetaLog vs Butterflai

The clearest difference is update cadence: Butterflai at every 2 weeks against PetaLog's every 2 months. PetaLog's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

PetaLog ships an update every 2 months, Butterflai every 2 weeks. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PetaLog | Butterflai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 22 MB | 30 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Vishnu Ponneth](https://appshunter.io/developer/1809207604) | [Futurist-iq](https://appshunter.io/developer/1895297259) |

## What reviewers say

### PetaLog

[App page](https://appshunter.io/ios/app/petalog/id6759199697)

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

**In-app purchases:** none


### Butterflai

[App page](https://appshunter.io/ios/app/butterflai/id6763400431)

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

**In-app purchases:** none


## Frequently asked questions

### Is PetaLog free?

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

### Is Butterflai free?

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

### Do PetaLog or Butterflai have ads?

Neither PetaLog nor Butterflai shows ads.

### Which is updated more often, PetaLog or Butterflai?

PetaLog ships an update every 2 months, and Butterflai every 2 weeks. Most recently, PetaLog was updated on October 6, 2026 and Butterflai on October 24, 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.*