Level

Levels are advanced by earning experience points (XP). As each level is reached, more frog breeds are unlocked. Current frog breeds go to level 36. The maximum level is 255.

Breeding frogs, taming frogs, and completing Award challenges earns XP. Each time a player levels up, stamps and potions equal to the player's level, and 500 more coins than for the previous level are given. The player also has the option to purchase new habitats, up to a total of the player’s current level, not including the nursery. With the VIP Package the player can purchase 2x as many habitats.

Experience Points
The amount of experience points (XP) earned from breeding a frog is equivalent to the amount it costs to breed it, and is earned as soon as the egg is placed in the nursery. For example, a frog that costs 1,677 coins to breed will reward 1,677 XP.

XP earned by taming a frog is calculated by the maximum price the specific frog can be sold for divided by 10 and rounded down to the nearest whole number (example: Max price is 125, 125/10 = 12.5 so the XP earned by taming is 12).

Eating the biggest flies at the Pond will give you 10 XP.

Strategy
Completing Award challenges is the best way to earn XP until you start breeding frogs worth more than 2000 coins at Level 8. Beyond Level 8, the fastest way to attain higher levels is to breed the most valuable frog that a player has.

Table of Levels
POP (Promotional or Potion) Frogs have an asterisk (*) after their names. VIP enables 2x the number of Habitats per level, up to a max of 65 Habitats plus the Nursery.

Problems displaying very large XP values
There are 255 levels. The XP for each level are determined by:

XP = 525 + 900*level + 150*level^2 - 100*level^3 + 25*level^4

Game versions 2 and older had problems with large XP values becoming negative in the display. The XP values appear to have been stored using 32-bit signed integers which are limited to 2,147,483,647 before overflowing into negative values. This would happen when a player reached Level 97. Version 3 and later store the XP value in a 64-bit integer and there is no problem with displaying very large values. On the habitat screens large values are abbreviated and displayed with M (for million) or B (for billion) after the numbers. Clicking on the "lvl" display will bring up a window with the exact values for the current XP and next level XP numbers.