# Bubble Level vs Goniometer

The clearest difference is rating: Bubble Level at 4.5 against Goniometer's 1.0. Bubble Level also leads on review sentiment (41% vs 0%) and ratings volume (702 vs 2). Goniometer's advantage is in-app purchases (none vs 11) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Bubble Level sells 11 in-app purchases, starting at $1.99 per 7 days. Goniometer asks for nothing beyond the download.

Bubble Level holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Bubble Level has 702 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 41% of Bubble Level's written reviews are positive against 0% of Goniometer's.

Bubble Level ships an update weekly, Goniometer monthly. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Bubble Level | Goniometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (702 ratings)](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/goniometer/id6736895084/reviews) |
| Number of ratings | **702** | 2 |
| Positive reviews | **41.4% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 29 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [GemRed](https://appshunter.io/developer/1279222567) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382)

This app transforms your phone into a precise leveling tool. It offers accurate angle measurement, inclination detection, and augmented reality features for DIY and professional use. Calibration is simple and quick.

**Highlights:** Ultra-precise angle measurement, Inclination and slope meter, Augmented reality ruler and protractor, Effortless one-touch calibration, Clear and easy-to-read display, User-friendly interface

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly Plan | $1.99 | per 7 days |
| Spirit Level Premium – Monthly | $2.99 | per month |
| Bubble Level Premium - Weekly | $2.99 | per 7 days |
| Bubble Level Premium - Monthly | $5.99 | per month |
| Spirit Level Premium – Annual | $14.99 | per year |
| Bubble Level Premium - Annual | $19.99 | per year |
| All features - No ads | $1.99 | one-time |
| Unlock all AR features | $5.99 | one-time |
| Discount Lifetime Premium | $14.99 | one-time |
| Bubble Level PREMIUM Lifetime | $19.99 | one-time |
| Bubble Level - Lifetime Premium | $29.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🔍 Accurate angle measurements
- 🛠️ Helpful for various tasks (telescopes, leveling, etc.)

**What reviewers complain about**

- 🤑 Expensive ad removal
- 🤖 Unreliable calibration
- 💤 Constant interruptions and ads
- 🚫 Unusable due to ads

**Reported bugs**

- App crashes on launch
- Measurement point behaves erratically

**Requested features**

- Ability to calibrate the app
- Option to change the display color


### Goniometer

[App page](https://appshunter.io/ios/app/goniometer/id6736895084)

Easily record joint motion range using Bluetooth connection with a digital goniometer. Track personal rehabilitation training progress for joint movement. Remember to consult a doctor before making medical decisions.

**Highlights:** Bluetooth connectivity with digital goniometer, Record joint range of motion, Track personal rehabilitation status, Monitor joint movement progress, Easy data recording

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level free?

Bubble Level is free to download, with in-app purchases available.

### Is Goniometer free?

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

### Which has better reviews, Bubble Level or Goniometer?

Bubble Level is rated higher. Bubble Level averages 4.5 out of 5 from 702 ratings, while Goniometer averages 1.0 from 2 ratings.

### Do Bubble Level or Goniometer have ads?

Bubble Level shows ads; Goniometer does not.

### Which is updated more often, Bubble Level or Goniometer?

Bubble Level ships an update weekly, and Goniometer monthly. Most recently, Bubble Level was updated on October 7, 2026 and Goniometer on September 27, 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.*