Timer IC 555 Calculator

Name: Timer IC 555 Calculator
Rating: 4.571429 (2393 reviews)
Author: Peter Ho

Peter Ho

★ 4.6 (2,393 ratings)

⬇ 100,000+ downloads

Est. actual: 270,439

Free

Released: Dec 26, 2013

IAP: $1.99 per item

Contains ads

Rated: Everyone

Signals

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

📈Last 7 days +50 installs — 35% slower than the week before (+77) · 8/day since Sep 26
🏆Among Tools apps top 20% by installs gained this week (1278 peers growing)
⭐Rating steady at ★ 4.57 since Sep 26
🛠Updates quiet · updated 70 days ago

Installs since launch

+329 installs · +4 ratings since Sep 26

Update history

4.0.30 Sep 3, 2026 · seen Sep 26, 2026

4.0.30<br>- Fix minor bugs<br>

Only the current version so far — new entries appear as the app ships updates.

Timer IC 555 Calculator is a tools app by Peter Ho with 100,000+ downloads (about 270K estimated). +50 installs in the last 7 days. Rated 4.6 from 2.4K ratings. Released Dec 26, 2013. Install growth, rank history, SDKs and ad networks.

From the store listing: “IC 555 is a basic timer IC for hobbyist or electronic engineers. This app is used to calculate monostable and astable circuit Features: 1. Calculate monostable circuit 2. Calculate frequency of astable circuit 3. Calculate component values of monostable and astable circuit. Save component values in CSV file (Excel…”