# Open vs BITS Lab

The clearest difference is price: BITS Lab at Free against Open's $4.99. BITS Lab also leads on update cadence (every 2 months vs every 10 months) and ratings volume (16 vs 3). Open's advantage is rating (5.0 vs 3.9) and review sentiment (100% vs 67%). On ads, in-app purchases and iOS requirement there is nothing between them.

BITS Lab is free to download; Open costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Open holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: BITS Lab has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Open's written reviews are positive against 67% of BITS Lab's.

Open ships an update every 10 months, BITS Lab every 2 months. The most recent releases landed on October 20, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Open | BITS Lab |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/open-ended-articulation/id704631125/reviews)** | [3.9 (16 ratings)](https://appshunter.io/ios/app/bits-lab-start/id1198658004/reviews) |
| Number of ratings | 3 | **16** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 295 MB | 66 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Erik X. Raj](https://appshunter.io/developer/529529123) | [Tara McAllister](https://appshunter.io/developer/1198658003) |

## What reviewers say

### Open

[App page](https://appshunter.io/ios/app/open-ended-articulation/id704631125)

This app provides over 500 open-ended questions with audio components to help individuals practice specific speech sounds. It's designed for speech-language pathologists and educators to facilitate articulation practice and encourage creative thinking in a fun, interactive way.

**Highlights:** Over 500 open-ended questions, Sound-specific practice (S, Z, R, L, etc.), Audio narrative for each question, Example audio responses, Child-friendly interface, No in-app purchases or external links

**In-app purchases:** none


### BITS Lab

[App page](https://appshunter.io/ios/app/bits-lab-start/id1198658004)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Open free?

Open costs $4.99, with no in-app purchases.

### Is BITS Lab free?

BITS Lab is free to download, with no in-app purchases.

### Which has better reviews, Open or BITS Lab?

Open is rated higher. Open averages 5.0 out of 5 from 3 ratings, while BITS Lab averages 3.9 from 16 ratings.

### Do Open or BITS Lab have ads?

Neither Open nor BITS Lab shows ads.

### Which is updated more often, Open or BITS Lab?

Open ships an update every 10 months, and BITS Lab every 2 months. Most recently, Open was updated on October 20, 2026 and BITS Lab on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*