“…For example, there are apps with picture books for beginners in reading (e.g., Cahill & McGill-Franzen, 2013), or multimodal e-books to train children's reading skills (e.g., Morgan, 2013), indicating different possibilities to support reading acquisition. Focusing on spelling in German, there are similar issues with the apps in terms of quality (Fleischhauer, Schledjewski, & Grosche, 2017). To date, no evidence-based app using a syllable-based approach with focus on orthographic and phonological processes is available.…”