Comparison

BITS Lab vs Sensory Arachne

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

Head to head
About

BITS Lab

This app uses visual biofeedback to help users, particularly children and adolescents, correct speech errors related to the American English 'r' sound. It offers guided practice, adaptive challenges, and progress tracking for effective speech therapy.

Highlights
  • Visual biofeedback for speech correction
  • Tutorial for biofeedback interpretation
  • Free play mode for 'r' practice
  • Adaptive quest mode for increasing difficulty
  • Quiz mode for progress tracking
  • Visual rewards for improvement
  • Clinician dashboard for progress monitoring
Features
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Many children, adolescents, and adults struggle to eliminate speech errors affecting the American English 'r' sound. Research suggests that these errors can in some cases be eliminated through biofeedback, where learners view a dynamic visual image of their speech and attempt to match a target representing correct production. staRt ("Speech Therapist's App for /r/ Treatment") aims to make biofeedback treatment for /r/ widely accessible to practicing speech-language pathologists. Features: - Tutorial explaining how to interpret and use the biofeedback display - "Free play" mode where users match their real-time visual-acoustic display to a target representing correct production of ‘r’ - "Quest" mode presenting syllables/words for 'r' practice; complexity increases or decreases in an adaptive fashion based on recent performance - "Quiz" mode for use in measuring baseline performance and tracking progress - Visual rewards reinforcing improvements in performance - Clinician dashboard tracking progress over the course of treatment

About

Sensory Arachne

Features
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Arachne is an accessible early learning sensory resource, simple to use. The digital, colorful spiders spin there way around the screen, following your touch or pointer. This app could be a useful resource for therapists or special education teachers when working with their students. Arachne could also be a fun activity in a Sensory room as a touch responsive cause and effect app. Some users may dislike spiders, some will enjoy them. There are a range of colorful digital spiders that will either follow your touch or pointer, or run away from your touch. Button 1, Space bar, Keyboard 1, XBox A resets the position of the digital spider(s) Button 2, Keyboard 2, XBox B changes the number of digital spiders on screen Button 3, Enter Key, Keyboard 3, XBox X switches between following the touch or running away. Once the spiders run to the edge of the screen tap button 1 to reset them Button 4, Keyboard 4, XBox Y changes the colors of the digital spiders Keyboard 5, XBox View Button turns off/on the on screen buttons. Tap Left and Right Buttons, Keyboard +/-, XBox List/Menu Button change the style and speed of the effects.

Screenshots

Sensory Arachne4 screens

Verdict

The call

The clearest difference is price: BITS Lab at Free against Sensory Arachne's $0.99. BITS Lab also leads on update cadence (every 2 months vs every 58 months) and iOS requirement (9.0 vs 16.4). 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

BITS Lab is free to download; Sensory Arachne costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BITS Lab ships an update every 2 months, Sensory Arachne every 58 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
BITS Lab versus Sensory Arachne: the parameters behind the verdict, then further details
ParameterBITS LabSensory Arachne
PriceFree — better$0.99
Rating3.9 (16 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings16 — better—
Update frequencyEvery 2 months — betterEvery 58 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPadiPhone, iPad — better
Requires iOS9.0 — better16.4
Further details — not scored
Size66 MB10 MB
Age rating4+4+
DeveloperTara McAllisterSensory App House Ltd

In-app purchases

None

BITS Lab

No in-app purchases

None

Sensory Arachne

No in-app purchases

Questions

Is BITS Lab free?
BITS Lab is free to download, with no in-app purchases.
Is Sensory Arachne free?
Sensory Arachne costs $0.99, with no in-app purchases.
Do BITS Lab or Sensory Arachne have ads?
Neither BITS Lab nor Sensory Arachne shows ads.
Which is updated more often, BITS Lab or Sensory Arachne?
BITS Lab ships an update every 2 months, and Sensory Arachne every 58 months. Most recently, BITS Lab was updated on November 2, 2026 and Sensory Arachne on November 7, 2026.

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