Table 2.
Participant ratings of app perceived usefulness and ease of use for top apps.
| App Name | Perceived | Adherence | |||||
| Usefulness | Ease of Use | Index | Text | Subtle | Difficult | ||
| n | Mean (SD) | Mean (SD) | Score | Heavy | Directions | Navigation | |
| NCI Quit Pal | 5 | 42 (4.8) | 18 (1.1) | 51 | 0 | 0 | xa |
| You Can Quit Smoking | 5 | 39 (5.1) | 16 (5) | 49.5 | x | 0 | 0 |
| San Francisco Stop Smoking | 5 | 37 (7.8) | 16 (4.4) | 43 | 0 | 0 | x |
| Quit Smoking Easily | 5 | 36 (3.7) | 16 (4.2) | 40 | x | 0 | 0 |
| Quit For You – Quit For Two | 3 | 43 (5) | 15 (1.7) | 39 | 0 | 0 | x |
| Quit For Life | 5 | 38 (6.6) | 15 (3.8) | 36 | 0 | x | 0 |
| Smoke Free – Stop Smoking Now | 5 | 32 (7.8) | 11 (5.9) | 34 | 0 | x | 0 |
| Smoking Cessation – SRIOR | 6 | 31 (7.9) | 14 (2.4) | 31.5 | x | 0 | 0 |
| Call It Quits | 5 | 31 (11) | 11 (4.6) | 29.5 | 0 | x | x |
ax indicates the presence and 0 indicates the absence of usability issues.