Support
Last updated 17 September 2026
Questions, bugs and suggestions: hdengineer.apps@gmail.com. It is a one-person project, so replies may take a few days.
iPhone, iOS 17 or later. Free, with no ads and no purchases. An Android version is in testing.
They are meant to be, eventually — but you can change it. On the title screen tap Settings and lower the opponent speed. The game ships at about 5% of a real bullfrog's speed, and can be dropped to 4% or 3%. Scores scale to match, so the scoreboard stays fair.
A demonstration rather than a difficulty. It runs the animals at their real measured speed, which is far below human reaction time — a bullfrog takes a fly in under 0.07 seconds. You will lose. That is the point of including it.
Yes. Every figure in the bestiary comes from published measurements, and the behaviour of each opponent is built from them rather than decorated with them.
Settings, from the title screen or the pause menu. English, Spanish, Persian and Kurdish (Sorani) are available, and the change applies immediately.
Scores live only on your device and are not backed up to any server, so deleting the app deletes them. There is no way to recover them.
Fly Duel collects no data at all. See the privacy policy.
Fly Duel is developed by Hiva Nasiri.