Level Extender is a level-extending mod. This is a very simple way to get a level above 10.

Some of its features are all of the vanilla skills acquire a maximum level of 100, the fishing is overhauled, levels past 10 slow down the degradation process of the reeling bar, fishing is moderately harder up until level 12, then it starts to get a little easier depending upon the level, and at level 100, the fishing bar goes up to an additional 100 pixels larger with the cork bobber.

On the other hand, the experience bar of this mode is the following:

The experience curve is just similar to the Runescape Level
The possibility to receive an extra item, especially when doing certain skill tasks based on skill level.
The experience continues and carries over from leveling.
Included cleaned up XP bars
And sets training fishing rod bar up to level 5