# ButterLens vs Filo

ButterLens and Filo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ButterLens ships an update every 5 days, Filo every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | ButterLens | Filo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Size | 43 MB | 40 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MING-TA HSIEH](https://appshunter.io/developer/1873851974) | [Songyi KIm](https://appshunter.io/developer/6789172705) |

## What reviewers say

### ButterLens

[App page](https://appshunter.io/ios/app/butterlens/id6760614659)

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

**In-app purchases:** none


### Filo

[App page](https://appshunter.io/ios/app/filo/id6789172703)

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

**In-app purchases:** none


## Frequently asked questions

### Is ButterLens free?

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

### Is Filo free?

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

### Do ButterLens or Filo have ads?

Neither ButterLens nor Filo shows ads.

### Which is updated more often, ButterLens or Filo?

ButterLens ships an update every 5 days, and Filo every 9 days. Most recently, ButterLens was updated on October 31, 2026 and Filo on October 31, 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.*