emf Spectrum

Name: emf Spectrum
Rating: 4.375 (51 reviews)
Author: Duncan Watson

Duncan Watson

★ 4.4 (51 ratings)

⬇ 5,000+ downloads

Est. actual: 8,716

Free

Released: Jun 25, 2013

No in-app purchases

No ads

Signals

4 this week · 2 positive · 2 warnings All of this week's signals →

📈Last 7 days +1 installs — 75% slower than the week before (+4) · 0/day since Oct 9
🏆Among Books & Reference apps bottom 0% by installs gained this week (382 peers growing)
⭐Rating ★ 4.29 → 4.38 since Oct 9
🛠Updates dormant · updated 496 days ago

Installs since launch

+13 installs · +1 ratings since Oct 9

Update history

1.0 Jul 3, 2025 · seen Oct 19, 2026

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

emf Spectrum is a books & reference app by Duncan Watson with 5,000+ downloads (about 8.7K estimated). +1 installs in the last 7 days. Rated 4.4 from 51 ratings. Released Jun 25, 2013. Install growth, rank history, SDKs and ad networks.

From the store listing: “Scrollable image of the electromagnetic spectrum from DC to x-rays”