# Project Sign vs Bubble Level

The clearest difference is ads: Project Sign at none against Bubble Level's shown. Project Sign also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (13.0 vs 15.1). Bubble Level's advantage is ratings volume (324 vs 1). On price, rating, in-app purchases and monetization model there is nothing between them.

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

Project Sign holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Bubble Level has 324 ratings behind it against 1, so its average is the more settled of the two.

Project Sign ships an update every 4 days, Bubble Level every 2 weeks. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Project Sign | Bubble Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/project-sign-off/id6478766501/reviews)** | [4.8 (324 ratings)](https://appshunter.io/ios/app/bubble-level-simple/id6757605234/reviews) |
| Number of ratings | 1 | **324** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 27 MB | 42 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aveese LLC](https://appshunter.io/developer/1733849422) | [Stijn Aa](https://appshunter.io/developer/1782102905) |

## What reviewers say

### Project Sign

[App page](https://appshunter.io/ios/app/project-sign-off/id6478766501)

Streamline installation sign-offs with this app. Easily input project details, attach images, and collect customer signatures to create professional documentation.

**Highlights:** Project information input, Image attachment, Signature collection, Installation sign-off documentation

**Features:** macOS Compatibility

**In-app purchases:** none


### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-simple/id6757605234)

This tool helps you determine if objects are straight and level. It displays angles on your phone and can use AR for precise measurements on walls and paintings. Ideal for home tasks like hanging pictures or ensuring shelves are flat.

**Highlights:** AR laser for walls, Angle display during rotation, Portrait and landscape orientation, AR painting leveler, User-friendly interface, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Project Sign free?

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

### Is Bubble Level free?

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

### Which has better reviews, Project Sign or Bubble Level?

Project Sign is rated higher. Project Sign averages 5.0 out of 5 from 1 ratings, while Bubble Level averages 4.8 from 324 ratings.

### Do Project Sign or Bubble Level have ads?

Bubble Level shows ads; Project Sign does not.

### Which is updated more often, Project Sign or Bubble Level?

Project Sign ships an update every 4 days, and Bubble Level every 2 weeks. Most recently, Project Sign was updated on October 7, 2026 and Bubble Level on October 21, 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.*