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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Best apps like Mobile Booklet
10+ similar apps compared and reviewed
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10 free apps
Updated July 2026
Whether you want more options like Mobile Booklet 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.
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