What is the best alternative to Cellular Tower - Signal Finder on iPhone?

Ubiquiti WiFiman, S tier, #1 in wifi analysis.

Is there a free alternative to Cellular Tower - Signal Finder?

Yes: Ubiquiti WiFiman (S tier, #1) is free, with no in-app purchases.

Yes. 5 apps rank above it in wifi analysis: Ubiquiti WiFiman (#1), iWifi - AR speed & signal test (#2), Speed Test & Wifi Analyzer + (#3) and more.

Cellular Tower - Signal Finder is C tier, #6 of 6 in wifi analysis. Here is everything that competes with it on iPhone, in tier order.

1
Ubiquiti WiFimanShigher tier
Free · ★ 4.8 · 40,900 ratings · score 94
Free Wi-Fi utility for detecting networks, scanning subnet devices, running speed tests, and remote UniFi access.
2
iWifi - AR speed & signal testAhigher tier
Free + IAP · ★ 4.6 · 17,957 ratings · score 87
Measures download, upload and ping speeds, Wi-Fi signal strength, and runs LAN device and Wi-Fi security checks.
3
Speed Test & Wifi Analyzer +Ahigher tier
Free + IAP · ★ 4.4 · 24,445 ratings · score 85
Network analyzer for diagnosing Internet and WiFi issues, scanning devices and open ports, tracing routes, and…
4
Wifi Analizer Signal StrengthC
Free + IAP · ★ 3.9 · 14,694 ratings · score 70
Runs speed tests on WiFi and cellular networks, shows ping, upload and download results, and keeps a history of past.
5
Verizon HomeC
Free · ★ 4.4 · 21,579 ratings · score 66
Verizon app for managing and troubleshooting Verizon Fios, 5G Home, or LTE Home network equipment and connected devices.

What is the best alternative to Cellular Tower - Signal Finder on iPhone?: Ubiquiti WiFiman, S tier, #1 in wifi analysis.
Is there a free alternative to Cellular Tower - Signal Finder?: Yes: Ubiquiti WiFiman (S tier, #1) is free, with no in-app purchases.
Does anything rank above Cellular Tower - Signal Finder?: Yes. 5 apps rank above it in wifi analysis: Ubiquiti WiFiman (#1), iWifi - AR speed & signal test (#2), Speed Test & Wifi Analyzer + (#3) and more.