There is no official price list. Costs below were seen once. A buy is worth it when it adds slots, extends climb reach, or multiplies earnings. Confirm by reading the animal's line after you place it.
| Upgrade | Cost seen | Benefit that was stated |
|---|---|---|
| House expansion | About 1,000,000 Cash | More room, immediately |
| Treadmill | 5,000,000 once; about 314,000 for an earlier level | Look changed at 5 million. Speed effect not stated. |
| Trials | 75, then 1,000,000 and 30,000,000 | Not stated. The 75-cost one lined up with faster Speed gains. |
| Chemical running speed | Quoted at 10T and 30T | Skipped as too expensive |
| 10 decillion money item | Bought twice | Only the money label |
| 2x hatching, 15x money, 2x training, 3x | Price never shown | The label itself |
Event lines such as hatch speed x25 and money x3 are temporary.
- First visit: runners, then stamina, until Cash hits zero.
- Skip rebirth while Speed still limits height.
- Around 1,000,000, if the base is full, buy the house. One player climbed from about 7,000 and bought it the moment the counter allowed, then placed again.
- Around 5,000,000, the treadmill upgrade was bought as soon as it was affordable. Treat it as a known price, not a known benefit.
- If a 3x, 4x, x10, or similar multiplier is on the counter, recorded players took it first.
- Late stickers can be absurd. Skipping 10T running speed was the recorded call.
If the base is full, capacity beats everything else in that moment. If you are one cheap upgrade from a new area, buy that before rebirth. Trials stay optional until you see what they change. The payback form on the calculator only does arithmetic on numbers you type. It does not know this game's rates.