Calm (iOS / Android ): includes guided practices for different aims (deep concentration, calming the children, relaxing, falling asleep), allows to select the duration (3-30 minutes).
Muse (iOS / Android): the headband, that captures your brain signals, decodes and transfers them to your smartphone or tablet. Uses the sounds of nature and their changing to keep you concentrated as much as possible during meditation. At the end of the session displays a detailed report, which shows how long the brain was in a calm, neutral and active state.