Calculate the height of lightning strikes using a simple stopwatch and physics formulas. Measure the time between seeing lightning and hearing thunder to determine distance and height.



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Whether you want more options like TRNDlabs SPECTRE or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.







Calculate the height of lightning strikes using a simple stopwatch and physics formulas. Measure the time between seeing lightning and hearing thunder to determine distance and height.





This utility app eliminates the frustration of manual calculations for evenly distributing items. It provides precise measurements for projects like installing balusters, hanging art, or building fences, working in either direction to find piece count or gap size.


Connect to virtual Narcotics Anonymous meetings globally from your iPhone or iPad. Meetings are automatically displayed in your local time, and the app integrates with videoconferencing apps to join sessions seamlessly.






Easily create and scan QR codes for various purposes, including contact information, URLs, and Wi-Fi access. Design custom codes with different types and manage your scan history.


Control your home's heating, cooling, and fan speed remotely. Adjust temperature settings, set timers, and manage your thermostat from anywhere using your smartphone. Make your home more comfortable with this intuitive application.


Control a toy quadrocopter using your device via WiFi. Stream real-time video directly from the drone. Experience aerial views and manage your drone's flight.