Table 2. Summary of Smartphone Mobile Apps Currently Available That Met Inclusion Criteria.

Name	Author or Developer	Description	QR Code	Incorporation of EB auditory learning principles	Language	App Compatability	Stimuli	Usability: Visual Layout	Usability: Clarity of instructions	Usability: Need for instruction
Hear Coach	Starkey Laboratories	Targeted for persons with HL, new and expereinced HA users. Uses listening games for cognitive and auditory training with varying types of background noise. Updated periodically.		Tracks progress, more difficult levels and background noise adjustment available	American English, French, German, Italian	iOS 5.1 or later, iPhone, iPad, iPod Touch (optimized for iPhone 5)	Word level, quiet or noise with varying types	Simple layout, easily visible with large font	No instructions with App once downlaoded, but easily navigable	Adults will need minimal instruction after account set up and demonstration
i-Angel Sound	University of California; TigerSpeech Technology Inc., Emily Fu Foundation	Interactive auditory training program, self-paced with at least 2000 stimuli. Can be used with children and adults.		Feedback is audio-visual, increasing difficulty, tracks progress	American English	iOS 5.0 or later, iPhone, iPad, iPod Touch, optimized for iPhone 5)	Environmental sounds, music, phonemes, monosyllabic words	Inadequate color contrast for older adults	No instructions with App once downladed, the many options for training may be confusing	Adults will need instruction and demonstration before using this app independently
AB Clix	Advanced Bionics	Word differences in quiet and noise uses over 2300 recorded words presented alone or in sentences		Placement test, provides feedback, tracks progress, more difficult levels available, background noise adjustable	American English	iOS 3.2 or later for iPhone or Ipad	Words and words in sentences	Good color contrast and font	Requires login before accessing the App, no instructions once App downloaded, but options are simple	Adults will need minimal instruction after login and demonstration
British English Vowel Training	Paul Iverson University of College London (UCL)	Designed to improve vowel perception of British English. Listener chooses speaker from one of 4 speaker options. Training uses single words in quiet. Listener selects answer from a closed set of 4 answers.		Provides feedback and repetition opportunity if wrong, final score provided at end of session.	British English	Requires iOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.	Words that emphasize different vowels	Good color contrast and font	No instructions with App once downloaded, but few options provided, so easy to navigate	Adults will need minimal instruction and demonstration