Rare Egg Run Planner
Enter a timing interval you observed in your current server, then use the calculator as a run predictor that compares it with your travel time and escape buffer.
The Steal an Egg calculator provides an interactive interval, round-trip budget, margin, leave-or-wait result, and local countdown. Players looking for a Steal an Egg predictor can use it to estimate whether their own observed timing leaves enough travel margin; it does not predict server spawns. The current official description does not publish a universal rare-egg timer, so the interval must come from an observation in your current server.
Rare Egg Run Planner
Test whether your trip and safety buffer fit before the next interval you observed. The current official description does not publish a universal timer.