While researching this topic I came across several articles listing a variety of Apps that can be useful for those with ADHD. Not surprisingly, many of these APPS are simple reminders, or assist with time management and organization. Some are designed for children, such as Epic Win which turns boring chores into a fun role playing adventure, or 123Token which rewards positive behaviours with a token system.
An APP named Rescue Time builds reports on how you spend your time. This allows you to track time spent procrastinating as compared to time spent on productive activities. Another APP, Freedom, allows you to set the time(s) that your internet is turned off, allowing you to restrict distractions at the end of day or for particular periods during the day. We all know that e-mails and social media etc. can be hugely distracting if not limited. Others are designed to help build healthy habits, manage your money and restrict impulsive spending.
A note of caution; be leery of Apps that claim to improve executive functioning and decrease ADHD symptoms. To date there are no peer reviewed, large scale studies that back up these claims.
Articles on Apps for those with ADHD