A pocket field guide to how big living and extinct organisms really are. If something isn't working the way you expect, this page is the place to start.
Life-size drawings are scaled from your device's screen size, so they are close but not exact. Small differences between devices are normal, and very large organisms can't be shown at true size at all.
Yes. Open Settings and choose Metric or Imperial under Units. Every trail, comparison and Size Duel round follows that choice.
In Settings, tap Reset progress and confirm. That clears the plates you have seen and your Size Duel scores on this device. It can't be undone.
No. Everything is on your device, there is no sign-in, and nothing is sent anywhere. Details are in our privacy policy.
Found a measurement that looks wrong, or a bug? Send a note to rosamund@tupelobrattice.info. Telling us your device model and iOS version helps. We read every message and usually reply within a few days.