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Readability ease and grade level scores of the original Mobile App Rating Scale and the simplified user version of the scale (uMARS).
| MARSa version | Reading ease | Readability level | Grade level | Reading age |
| Original | 47.2 | Difficult | 9.5 | 15-16 years old |
| uMARSa | 58.0 | Plain English – fairly difficult | 7.9 | 12-13 years old |
a MARS: Mobile App Rating Scale; uMARS: user version of the MARS.
