Smart Protractor

Name: Smart Protractor
Rating: 4.03 (18119 reviews)
Author: Smart Tools co.

Smart Tools co.

★ 4.0 (18,119 ratings)

⬇ 5,000,000+ downloads

Est. actual: 5,193,396

Free

Released: Sep 11, 2010

No in-app purchases

Contains ads

Rated: Everyone

Signals

4 this week · 1 positive · 1 warning All of this week's signals →

📈Last 7 days +2.5K installs — 34% slower than the week before (+3.8K) · 332/day since Oct 1
🏆Among Tools apps top 4% by installs gained this week (940 peers growing)
⭐Rating steady at ★ 4.03 since Oct 1
🛠Updates quiet · updated 36 days ago · every ~126 days (2 updates tracked)

Installs since launch

+11,956 installs · -18 ratings since Oct 1

Update history

1.6.5 Oct 6, 2026 · seen Oct 17, 2026

- v1.6.5 : Support for Android 17<br>- v1.6.4 : More models have been calibrated

1.6.4 Jun 2, 2026 · seen Oct 1, 2026

- v1.6.4 : More models have been calibrated<br>- v1.6.2 : Support for Android 16

Trailer

Smart Protractor is a tools app by Smart Tools co. with 5,000,000+ downloads (about 5.2M estimated). +2.5K installs in the last 7 days. Rated 4.0 from 18K ratings. Released Sep 11, 2010. Install growth, rank history, SDKs and ad networks.

From the store listing: “Smart Protractor is in the 1st set of the Smart Tools collection. This app measures the angle and the slope of an object. It has three protractor modes. 1. Touch mode : for angle. After putting an object on the screen, touch the screen. 2. Plumb mode : for slope. A weight shows the slope of your device. 3. Camera…”