Download 
Get Cell Tower Finder & Locator
Free on iPhone and Android, with the same 45M-tower map, radar and AR aiming, and built-in speed test on both.
On a computer? Scan this with your phone's camera and it opens the right store on the phone.
iPhone and iPad on the App Store (also runs on Macs with Apple silicon and Apple Vision Pro). Android devices on Google Play. Free to download; an optional premium unlock is available as a subscription or a one-time purchase.