Writing Wizard - 4.99
Compatibility: Requires iOS 10.3 or later on iPhone, iPad, iPod touch
Writing Wizard for Kids is designed to teach handwriting to early education aged children through interactive tracing activities, animations and worksheets. In order to meet the child at their level, parents can adjust the difficulty of the activities either by importing external word lists, or altering the original app lists and letter size. Children can learn to trace shapes, numbers, letters and words in multiple different fonts while also learning phonics for the letters and words. Parents can track the progress and activities completed by their child.
There is also a free version of this app in the Play Store for Android devices (OS 4.0+), but the features are limited to 8 letters, 8 words, 8 numbers, all shapes, and you cannot import external words.