BITS Lab vs GRBASZero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
GRBASZero
This app analyzes voice data to estimate hoarseness based on the GRBAS scale. It utilizes a machine learning model built from data collected at a hospital's otolaryngology department. The app focuses on evaluating the long vowel sound "A".
- Voice data analysis
- GRBAS scale estimation
- Machine learning model
- Hoarseness evaluation
- Long vowel sound analysis
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Machine learning is performed based on voice data collected at the Department of Otolaryngology, Tenri Yorozu Hospital, and the generated learning model was built-in this app. When the long vowel sound "A" is uttered, this app displays an estimation based on GRBAS scale, which is an auditory-perceptual evaluation method for hoarseness of the Japan Society of Logopedics and Phoniatrics.
Screenshots
Verdict
The clearest difference is review sentiment: BITS Lab at 67% against GRBASZero's 0%. BITS Lab also leads on iOS requirement (9.0 vs 13.0). GRBASZero's advantage is device support (3 vs 1). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
BITS Lab ships an update every 2 months, GRBASZero every 5 weeks. The most recent releases landed on September 25, 2026 and October 6, 2026 respectively.
| Parameter | BITS Lab | GRBASZero |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (14 ratings) — better | — |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 14 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 66 MB | 30 MB |
| Age rating | 4+ | 12+ |
| Developer | Tara McAllister | ENTZERO, LIMITED LIABILITY CO. |
Customer experience
BITS Lab
GRBASZero
In-app purchases
BITS Lab
No in-app purchases
GRBASZero
No in-app purchases
Questions
Is BITS Lab free?
Is GRBASZero free?
Do BITS Lab or GRBASZero have ads?
Which is updated more often, BITS Lab or GRBASZero?
Other comparisons
