NEC 690 Reference icon

NEC 690 Reference

ZkDev

⬇ 5+ downloads

Est. actual: 7

Free

Released: May 9, 2026

IAP: $2.99 per item

Contains ads

Signals

3 this week · 2 positive All of this week's signals →

📈Last 7 days +1 installs — 0% faster than the week before (+1) · 0/day since Oct 8
🏆Among Tools apps bottom 0% by installs gained this week (1237 peers growing)
🛠Updates quiet · updated 57 days ago

Installs since launch

+2 installs since Oct 8

Update history

1.1.2 Sep 16, 2026 · seen Oct 25, 2026

Added a link to TradeTools — 62 trade calculators in one app, for HVAC, electrical, plumbing, fire protection, solar and carpentry. Nothing else changed.

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

NEC 690 Reference is a tools app by ZkDev with 5+ downloads (about 7 estimated). +1 installs in the last 7 days. Released May 9, 2026. Install growth, rank history, SDKs and ad networks.

From the store listing: “60 NEC articles, 5 calculators, quiz and worked examples for solar PV pros.”