# Bubble Level vs Sino

The clearest difference is price: Bubble Level at Free against Sino's $0.99. Bubble Level also leads on update cadence (every 10 months vs every 38 months). Sino's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Bubble Level is free to download; Sino costs $0.99 up front. Bubble Level sells 1 one-off in-app purchase. Sino asks for nothing beyond the download.

Bubble Level ships an update every 10 months, Sino every 38 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Bubble Level | Sino |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (3.1K ratings)](https://appshunter.io/ios/app/bubble-level-spirit-level/id906629042/reviews)** | — |
| Number of ratings | **3.1K** | — |
| Positive reviews | 29.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 months** | Every 38 months |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 4 MB |
| Requires iOS | 17.0 | **14.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Netviking AB](https://appshunter.io/developer/425652251) | [Benjamin Graf](https://appshunter.io/developer/1545255558) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-spirit-level/id906629042)

This utility app functions as a precise spirit level for your iOS devices. It's ideal for tasks like aligning picture frames, measuring angles, and checking the levelness of various surfaces. The app offers calibration and accurate readings to a tenth of a degree.

**Highlights:** Measure surface level, Calibrate with one click, Accurate to 0.1 degree, Retina display support, Picture frame alignment, Angle and slope measurement

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |

**What reviewers like**

- 👍 Handy app to have available
- 🚀 Easy to use
- 💡 Useful for home jobs
- 🚀 Accurate and functional

**What reviewers complain about**

- 🐛 Ads constantly interrupt usage
- 🐛 Ads prevent app from working properly
- 🐛 Ads and games take over the app
- 🐛 Calibration issues and inability to use vertically

**Reported bugs**

- Ads crash the app
- Inability to exit the app due to ads
- Calibration button doesn't work as expected

**Requested features**

- Percent slope display option
- Ability to rotate bubble to vertical position


### Sino

[App page](https://appshunter.io/ios/app/sino/id1545255556)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level free?

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

### Is Sino free?

Sino costs $0.99, with no in-app purchases.

### Do Bubble Level or Sino have ads?

Bubble Level shows ads; Sino does not.

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

Bubble Level ships an update every 10 months, and Sino every 38 months. Most recently, Bubble Level was updated on November 6, 2026 and Sino on November 3, 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.*