With so many apps on the market, it’s hard to know which are useful.

Many are designed by software developers instead of psychologists, without scientific testing. They range from beneficial, to harmless but useless, to bordering on fraudulent.

The apps selected for this list make no hucksterish claims and are based on established treatments. Progressive Muscle Relaxation, for example, has been used for a century and is likely just as effective in this new medium. Knowledge from Cognitive Behavioral Therapy and Dialectical Behavior Therapy enrich two apps on this list. Others mix solid information with ingenuity.

Don’t forget to download the free PsychCentral app to keep up with the latest mental health information.

1. BellyBio

Free app that teaches a deep breathing technique useful in fighting anxiety and stress. A simple interface uses biofeedback to monitor your breathing. Sounds cascade with the movements of your belly, in rhythms reminiscent of waves on a beach. Charts also let you know how you’re doing. A great tool when you need to slow down and breathe.

2. Operation Reach Out

Literally a lifesaving app, this free intervention tool helps people who are having suicidal thoughts to reassess their thinking and get help. Recommended by followers of @unsuicide, who report that this app has helped in suicidal crises. Developed by the military, but useful to all. Worth a download even if you’re not suicidal. You never know if you might need it.

3. eCBT Calm

Provides a set of tools to help you evaluate personal stress and anxiety, challenge distorted thoughts, and learn relaxation skills that have been scientifically validated in research on Cognitive Behavioral Therapy (CBT). Lots of background and useful information along with step-by-step guides.

4. Deep Sleep with Andrew Johnson

Getting enough sleep is one of the foundations of mental health. A personal favorite I listen to all the time, this straightforward app features a warm, gentle voice guiding listeners through a Progressive Muscle Relaxation (PMR) session and into sleep. Features long or short induction options, and an alarm.

5. WhatsMyM3

A three minute depression and anxiety screen. Validated questionnaires assess symptoms of depression, anxiety, bipolar disorder, and PTSD, and combine into a score that indicates whether or not your life is impacted significantly by a mood disorder, recommending a course of action. The app keeps a history of test results, to help you track your progress.

6. DBT Diary Card and Skills Coach

Based on Dialectical Behavior Therapy (DBT) developed by psychologist Marsha Linehan, this app is a rich resource of self-help skills, reminders of the therapy principles, and coaching tools for coping. Created by a therapist with years of experience in the practice, this app is not intended to replace a professional but helps people reinforce their treatment.

7. Optimism

Track your moods, keep a journal, and chart your recovery progress with this comprehensive tool for depression, bipolar disorder, and anxiety disorders. One of the most popular mood tracking apps available, with plenty of features. Free.

8. iSleepEasy

A calm female voice helps you quell anxieties and take the time to relax and sleep, in an array of guided meditations. Separately controlled voice and music tracks, flexible lengths, and an alarm. Includes a special wee hours rescue track, and tips for falling asleep. Developed by Meditation Oasis, who offer an great line of relaxation apps.

9. Magic Window – Living Pictures

Not technically a mental health app, it makes no miraculous claims about curbing anxiety. However, there is independent research indicating that taking breaks and getting exposure to nature, even in videos, can reduce stress. This app offers an assortment of peaceful, ambient nature scenes from beautiful spots around the world.

10. Relax Melodies

A popular free relaxation sound and music app. Mix and match nature sounds with new age music; it’s lovely to listen to birds in the rain while a piano softly plays.

Do you have a favorite app not on the list?

Please share links in the comments.

Top 10 Mental Health Apps