Project Sign vs Bubble Level
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Project Sign
Streamline installation sign-offs with this app. Easily input project details, attach images, and collect customer signatures to create professional documentation.
- Project information input
- Image attachment
- Signature collection
- Installation sign-off documentation
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Use Project Sign-off to provide installation sign-off documentation to your customers. It's as simple as filling out the project information, adding pictures, and adding signatures.
Bubble Level
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.
- AR laser for walls
- Angle display during rotation
- Portrait and landscape orientation
- AR painting leveler
- User-friendly interface
- Offline functionality
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Need to check if a something is straight? Use this level tool. It helps you see if shelves and pictures are flat. The level shows angles on your phone. • Use AR laser for walls • See angles as you rotate your phone • Works on side or upright • Use AR to level paintings • Easy for anyone to use • Works without internet Hang a picture straight on the wall. Make sure a shelf is flat before you put items on it. Check if a table sits level on the floor. This tool helps with many jobs at home. Start checking if it is level in seconds.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Project Sign | Bubble Level |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (324 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 324 — better |
| Update frequency | Every 4 days — better | Every 2 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 27 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Aveese LLC | Stijn Aa |
Customer experience
Project Sign
Bubble Level
In-app purchases
Project Sign
No in-app purchases
Bubble Level
No in-app purchases
Questions
Is Project Sign free?
Is Bubble Level free?
Which has better reviews, Project Sign or Bubble Level?
Do Project Sign or Bubble Level have ads?
Which is updated more often, Project Sign or Bubble Level?
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