Darts AppRentice: Checkouts Practice play online

Ideal For
the ending of the x01 (i.e. 501, 301, etc), double out games
discovering checkouts best tailored to personal skills and preferences
assisting a team member at the oche by entering their hits and calling out next targets (for the mathematically disabled)
practicing muscle memory

Checkouts
Let's face it: checkouts / outshots tables are by the masters for the masters. These are checkouts for everybody else. Configure personal checkouts or use generic checkouts where, if possible, multiple choices are given per score with the emphasis on the most popular doubles (D20 & D16), the most popular triples (T20 & T19) and dartboard clusters (look for orange markers in screenshot 2; see below for full description).

Muscle Memory Practice
Muscle memory practice consists of throwing at the same target until it is hit before moving on to the next one.

Checkouts Usage
enter remaining score
browse available checkouts
switch easily between personal and generic checkouts
enter what you hit (e.g. 20, T19, D16 or 0 for no score)
a new remaining score is calculated and its checkouts are shown

Dartboard Clusters
Clusters are neighboring areas of the dartboard; when either is hit, it leads to a good checkout, thus greatly increasing the chances of success (the bigger the area, the easier the target). There are two types of clusters:
multi checkout, e.g. for score 110 (see screenshot 2 above)
triple/single, e.g. one of the checkouts for score 116 (see screenshots 4 above) is T19, 19, D20; hitting single 19 while aiming at triple 19 gives you another chance at the triple.