# GPF Bubble Level vs Sensor

GPF Bubble Level and Sensor are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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.

## The numbers

| Metric | GPF Bubble Level | Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 0 MB | 30 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Gian Paolo Fontani](https://appshunter.io/developer/1866631629) | [Yerim Lab LLC](https://appshunter.io/developer/6776811924) |

## What reviewers say

### GPF Bubble Level

[App page](https://appshunter.io/ios/app/gpf-bubble-level/id6759933601)

**In-app purchases:** none


### Sensor

[App page](https://appshunter.io/ios/app/sensor-stream/id6783206955)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is GPF Bubble Level free?

GPF Bubble Level is free to download, with no in-app purchases.

### Is Sensor free?

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

### Do GPF Bubble Level or Sensor have ads?

Neither GPF Bubble Level nor Sensor shows ads.

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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.*