There are many apps that have the potential to improve different aspects of life. Here are a few examples of popular apps that people have found to be life-changing:
1. Headspace:
A meditation and mindfulness app that offers guided meditations, sleep exercises, and mindfulness activities to help people reduce stress, increase focus, and improve overall well-being.

2. Evernote:
A note-taking and organization app that allows users to create notes, set reminders, and organize their thoughts and ideas in one place.

3. Forest:
A productivity app that gamifies staying focused by growing virtual trees when users stay away from their phones and help people to focus and stay away from distractions.

4. MyFitnessPal:
A fitness and nutrition tracking app that helps users set and track fitness and nutrition goals, log workouts, and meals, and get personalized insights and recommendations.

5. Sleep Cycle:
A sleep tracking app that uses the accelerometer in your phone to track your movement during the night and helps you to wake up at the optimal time in your sleep cycle for a more natural wake-up experience.

6. Duolingo:
A language learning app that uses interactive exercises and games to make language learning fun and effective.

7. RescueTime:
A time-tracking app that tracks how you spend your time on your devices and helps you to understand your habits and identify areas where you might want to make changes.

It’s worth noting that these are just a few examples and that different apps may be more suitable for different people, depending on their needs and preferences.