Comparison

HemiStim vs Feather squadron 2

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HemiStim

This app offers visual stimulation for specific brain lobes, aiding in hemispheric connectivity. It utilizes color patterns and eye-tracking exercises for targeted left or right brain stimulation, controllable via simple taps and swipes. Therapy sessions are automatically tracked and can be emailed to clinicians.

Highlights
  • Visual stimulation of frontal, parietal, occipital, temporal lobes
  • Hemispheric brain stimulation
  • Color pattern selection
  • Eye tracking for saccadic and pursuit movements
  • Adjustable blink rate and timer
  • Automatic therapy session tracking
  • Clinician-patient email communication
Features
Currently charting
Read full description

Hemistim can be used as a visual stimulation of areas of the frontal, parietal, occipital, and temporal lobes hemispherically. It is a specific brain stimulation which is rarely used in conjunction with other treatments but can be used as a portion of a home-based program or an office-based program. Such usage may lead to improved hemispheric connectivity specific, targeted areas of the brain and its connections to the parietal/temporal or frontal cortices. Hemistim provides a visual stimulation through utilizing color patterns and eye tracking that can be used for specific left or right visual exercise. The stimulus is recognized and  interpreted by the contralateral (opposite) occipital lobe. Pursuit and saccadic eye movements are created by targeting on the moving object. Pursuit away from and saccade towards the alternating squares are initiated by the ipsilateral (same side) parietal and frontal cortex, respectively.  This gives the doctor the ability to work the frontal, parietal, occipital, and temporal lobes hemispherically.  HemStim is easy to use. Swipe left or right to select a different colored pattern. Multiple patterns are available. Tap a pattern to make it begin blinking. The pattern will blink until the timer stops it. Double tapping the pattern will also make it stop. The blink rate and timer can be changed using the sliders. Target motion is controlled by the tapping the small target to the right of the speed control. Choose among no motion, saccade, and pursuit by successive taps on the small target. Exterior motion is indicated by purple arrows on the target and interior motion by white arrows. The new Saccades screen only displays target motion. Drag the purple target with one finger to set the direction and length of its motion. Tap the screen once simultaneously with two fingers to switch between saccades, a dashed line, and pursuits, a solid line. Tap the screen once with one finger to start the saccades or pursuits. Double tap the screen with one finger to stop the target motion. HemiStim automatically tracks therapy sessions, recording all pertinent information about each one. Maintain close communication between clinician and patient via email.

About

Feather squadron 2

Features
Read full description

This app contains a variety of fun games for children to play (ages 5 and up) and we measure their listening abilities while they play! This app has a quick screening option for parents and teachers, and a comprehensive testing option for appropriate professionals only. This version has been localised for US English. Please see other versions for other countries/accents. For Teachers and Parents: If you think that your child has listening, language or learning problems that might be related to auditory processing, you can use our quick screening to find out if there are any concerns. If you are concerned, regardless of the screening results, we recommend you visit your local audiologist or speech-language pathologist and recommend this app to get your child's auditory processing abilities tested thoroughly as well as traditional hearing testing performed. This app contains a variety of fun games for children to play (ages 5 and up) and we measure their listening abilities while they play! Your specialist can then recommend the appropriate action including treatments and strengthening exercises based on these results. For the professional: Researchers for years have shown the importance of auditory processing abilities and their correlations to language, reading, and educational abilities. Professionals (audiologists, speech-language pathologists, educational psychologists, paediatricians, etc) have not been able to measure auditory processing abilities routinely. There are a variety of reasons given for this; time-constraints, cost-constraints, limited knowledge on how to administer, limited knowledge on how to interpret the findings. Now, the team at Acoustic Pioneer have created a fast, fun, and easy way to measure multiple areas of auditory processing using an iPad app! The assessment app has been developed and normed on over 1000 children. The results are analysed immediately and you will receive a report on the results for your client comparing their ability to that of same-aged peers and will come with recommendations including therapy options, suggestions for teachers, compensatory strategy suggestions, or other information that would be helpful.

Screenshots

HemiStim3 screens
Feather squadron 24 screens

Verdict

The call

The clearest difference is price: Feather squadron 2 at Free against HemiStim's $9.99. Feather squadron 2 also leads on update cadence (every 5 days vs every 8 months). HemiStim's advantage is chart position (#200 vs unranked) and iOS requirement (12.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Feather squadron 2 is free to download; HemiStim costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HemiStim ships an update every 8 months, Feather squadron 2 every 5 days. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 7 level
HemiStim versus Feather squadron 2: the parameters behind the verdict, then further details
ParameterHemiStimFeather squadron 2
Price$9.99Free — better
Rating2.4 (5 ratings) — better—
Positive reviews37.5% of reviews—
Number of ratings5 — better—
Update frequencyEvery 8 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#200 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size1 MB18 MB
Age rating4+4+
DeveloperLinsay Associates, LLCAcoustic Pioneer

In-app purchases

None

HemiStim

No in-app purchases

None

Feather squadron 2

No in-app purchases

Questions

Is HemiStim free?
HemiStim costs $9.99, with no in-app purchases.
Is Feather squadron 2 free?
Feather squadron 2 is free to download, with no in-app purchases.
Do HemiStim or Feather squadron 2 have ads?
Neither HemiStim nor Feather squadron 2 shows ads.
Which is updated more often, HemiStim or Feather squadron 2?
HemiStim ships an update every 8 months, and Feather squadron 2 every 5 days. Most recently, HemiStim was updated on October 2, 2026 and Feather squadron 2 on October 3, 2026.

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