# BITS Lab vs Voice Spectrogram Logger

The clearest difference is review sentiment: BITS Lab at 67% against Voice Spectrogram Logger's 0%. BITS Lab also leads on rating (4.2 vs 1.0) and in-app purchases (none vs 1). Voice Spectrogram Logger's advantage is device support (3 vs 1). On price, ads and monetization model there is nothing between them.

Both are free to download. Voice Spectrogram Logger sells 1 one-off in-app purchase. BITS Lab asks for nothing beyond the download.

BITS Lab holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: BITS Lab has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of BITS Lab's written reviews are positive against 0% of Voice Spectrogram Logger's.

BITS Lab ships an update every 2 months, Voice Spectrogram Logger every 15 months. The most recent releases landed on July 7, 2026 and July 29, 2026 respectively.

## The numbers

| Metric | BITS Lab | Voice Spectrogram Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (14 ratings)](https://appshunter.io/ios/app/bits-lab-start/id1198658004/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462/reviews) |
| Number of ratings | **14** | 1 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 66 MB | 7 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Tara McAllister](https://appshunter.io/developer/1198658003) | [Yukiko Iwai](https://appshunter.io/developer/965630131) |

## What reviewers say

### 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


### Voice Spectrogram Logger

[App page](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462)

Visualize voice frequencies in a spectrogram from 20-2500Hz. Adjust display with sliders and log recordings to export as PNG files. Functions fully offline and supports background processing.

**Highlights:** Real-time voice spectrogram display, Adjustable frequency range (20-2500Hz), Zoomable spectrogram with pinch gestures, Customizable spectrogram gradation, Logging mode with history export, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is BITS Lab free?

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

### Is Voice Spectrogram Logger free?

Voice Spectrogram Logger is free to download, with in-app purchases available.

### Which has better reviews, BITS Lab or Voice Spectrogram Logger?

BITS Lab is rated higher. BITS Lab averages 4.2 out of 5 from 14 ratings, while Voice Spectrogram Logger averages 1.0 from 1 ratings.

### Do BITS Lab or Voice Spectrogram Logger have ads?

Neither BITS Lab nor Voice Spectrogram Logger shows ads.

### Which is updated more often, BITS Lab or Voice Spectrogram Logger?

BITS Lab ships an update every 2 months, and Voice Spectrogram Logger every 15 months. Most recently, BITS Lab was updated on July 7, 2026 and Voice Spectrogram Logger on July 29, 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.*