AcoustiTools® vs VOID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AcoustiTools®
This app provides professional-grade audio analysis and diagnostic tools using augmented reality. It helps map sound levels, calculate delay timing, and offers corrective EQ settings for live sound, studios, car audio, and home theater.
- Augmented Reality Spatial Analyzer
- Volume Mapping and Variance
- Delay Timing Calculation
- Diagnostic Parametric EQ (IAP)
- Diagnostic Graphic EQ (IAP)
- Real-Time Frequency Analyzer
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AcoustiTools® — Professional Tools for iPhone and iPad with Augmented Reality for Live Sound, Studio, Car Audio, and Home Theater. AcoustiTools is a new generation of professional-grade audio analysis and diagnostic tools using ARKit to elevate the audio experience. Five interactive modules – four tile display: 1) Audio Information in Augmented Reality Know the volume level across the venue using the ground-breaking AR Spatial Analyzer module. This module uses augmented reality (AR) to tag locations and calculate the volume level, distance, and delay for each placed tag. Ever need to use asymmetrically placed speakers? Prevent a blurred delay of sound for the audience. With the AR Spatial Analyzer module, you can instantly know how to accommodate for the depth difference and correct the time alignment. - Map The Volume The Volume Variance feature uses tagged locations to quickly map the sound level variations from tagged and labeled main speakers to your current position. The live values display in a 2D overlay allowing you to monitor the sound levels across the audience and keep the volume enjoyable for everyone. - Simplify Delay Timing The Delay Calc feature makes it simple to solve delay problems, calculating the delay timing between a tagged and labeled front speaker and delay stack. The displayed results give you the information needed to quickly sync your audio. 2) Diagnostic PEQ (in-app-purchase) Using the revolutionary real-time Diagnostic PEQ (parametric equalizer) module to listen to pink noise, receive recommended corrective EQ settings to implement for tuning your audio system, whether you’re in a large or small space. Want to reduce the stress of identifying the most problematic frequencies under pressure and choosing the most effective EQ settings to correct it? Available through in-app-purchase, the revolutionary Diagnostic PEQ module diagnoses your audio and recommends a corrective EQ curve to implement for your mix based on live audio or averaged recorded samples. With values for each setting of your PEQ — the center frequency, the Q, and the amplitude — you have a professional, real-time solution to your immediate audio challenges. 3) Diagnostic GEQ (in-app-purchase) If your system uses a graphic equalizer, use the revolutionary real-time Diagnostic GEQ (graphic equalizer) module to listen to pink noise and receive recommended corrective GEQ settings to implement for tuning your audio system, whether you’re in a large or small space. Want to quickly balance your car’s audio system? Set the Diagnostic GEQ to match the number of bands your car’s audio system uses. Available through in-app-purchase, the revolutionary Diagnostic GEQ module diagnoses your audio and recommends a corrective EQ curve based on live audio or averaged recorded samples making it easy to get the most out of your audio system. 4) Real-Time Analyzer The RTA module gives you the information you need to determine the best on-the-fly frequency corrections. The AcoustiTools RTA module includes a red problem frequency line to highlight the frequency on the RTA graph with the largest difference from surrounding frequencies. You can also keep your eye on a specific frequency you set using the blue selectable frequency line. Easily switch between a spectrum color display for bright environments or display the graph in solid blue for dimmer environments. 5) dB Meter - Max-Peak/Max-Average - Fast/Slow - User selectable Max-Average time periods - Threshold Alerts __________ AcoustiTools’ innovative design simultaneously displays four active modules. This breakthrough feature allows you to view information from multiple modules at once and quickly select a module to interact with. Global Features: - Spectral Weightings - Averaging Options - Selectable Block Sizes - Microphone Calibration Trim AcoustiTools — superpowers in your hands. For tutorial videos & the user guide, go to www.acousticmasterminds.com
VOID
Securely encrypt your messages offline with military-grade AES-256 encryption. Customize parameters, use hidden keys for extra protection, and even encode texts into emoji. Your data remains entirely on your device, ensuring complete privacy.
- Offline AES-256 encryption
- Customizable encryption parameters
- Hidden key (VOID Secret)
- Emoji text encoding
- No internet connection required
- No accounts or registration
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With VOID, you can: • Encrypt your texts securely and offline. VOID uses AES-256 encryption to protect your information with military-grade security. All encryption and decryption happen locally on your device - your data never leaves your phone. No cloud storage, no internet connection, no third-party servers. Your information stays completely offline. • Encrypt your files with AES-256 + Argon2id. VOID protects not just text, but your files too. File encryption combines AES-256 with Argon2id - a memory-hard key derivation function that won the Password Hashing Competition - making brute-force attacks practically impossible. Encrypt any file directly on your device with no internet connection required. • Customize encryption parameters. Take full control of how your data is secured. Fine-tune settings including salt length (0-256 bytes), number of iterations (up to 500), memory usage (up to 1024 MiB), parallelism (up to 6 threads), and key length (up to 224 bytes). Apply up to 7 layers of encryption for maximum security. Advanced users can optimize encryption strength according to their needs. • Use a hidden key (VOID Secret). VOID Secret is a hidden key variant generated per device. Each device can generate up to 999 different hidden keys, providing an extra layer of protection. Only you can decrypt messages with the correct VOID Secret - your communication stays fully confidential even if the main password is shared. The hidden key is optional but adds meaningful security for sensitive conversations. • Encode your texts in emoji. Transform your messages into emoji sequences. VOID converts your text to Base64 and then into emojis, so you can send encrypted messages that look like strings of symbols. Adds a layer of secrecy while making encryption visually engaging. • Generate and customize QR codes. Turn any encrypted text into a QR code. Customize appearance - colors, style, and format - then export in multiple formats and share however you choose. Additional Features: Offline-first design: VOID never connects to the internet, stores, or transmits your data. No accounts or registration: No personal information is ever required. Temporary decryption timer: Set a self-expiring timer so messages can only be decrypted within a limited time. Security Mode: Blocks screenshots and screen recordings completely. Multilingual support: Use VOID in your preferred language. Intuitive UI/UX: Designed with Apple's guidelines in mind, with animations, haptic feedback, and simple navigation. With VOID, your information is encrypted and under your full control. You decide how, when, and with whom to share it. Secrets truly stay secret. Links Privacy Policy: https://ge-developer.github.io/VOID/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: VOID at Free against AcoustiTools®'s $39.99. VOID also leads on rating (5.0 vs 4.4). AcoustiTools®'s advantage is update cadence (every 2 months vs every 6 months) and ratings volume (7 vs 1). On review sentiment, 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
VOID is free to download; AcoustiTools® costs $39.99 up front. AcoustiTools® sells 2 one-off in-app purchases and VOID sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
VOID holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: AcoustiTools® has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
AcoustiTools® ships an update every 2 months, VOID every 6 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | AcoustiTools® | VOID |
|---|---|---|
| Price | $39.99 | Free — better |
| Rating | 4.4 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.3 — better | 18.0 |
| Further details — not scored | ||
| Size | 158 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | ACOUSTIC MASTERMINDS INC. | Mikhail Bukhrashvili |
Customer experience
AcoustiTools®
VOID
In-app purchases
AcoustiTools®
- Diagnostic PEQ$19.99
- Diagnostic GEQ$19.99
VOID
- Monthly3 Days trial$1.991 Month
- Annual$5.991 Year
- Lifetime$9.99









