Comparison

MEMORY Karman Line vs VoxApp

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

Head to head
About

MEMORY Karman Line

Features
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Karman Line MEMORY helps you by making smart use of external and internal reminders. This app was developed in collaboration with Radboud University, Donders Institute for Brain, Cognition and Behavior and Klimmendaal Rehabilitation Specialists. MEMORY is CE certified as a medical device EU MDR 2017/45, UDI-DI code: 08720892379832 and is following the GSPR data restrictions.

About

VoxApp

Features
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IMPORTANT SAFETY NOTICE: VoxApp is intended SOLELY for educational and research purposes. Results should NOT be used for clinical diagnosis without a complete professional voice assessment by a qualified healthcare provider. This app is a supplementary tool for voice documentation and monitoring by trained professionals. VoxApp is the most comprehensive voice acoustic analysis app for vocal health professionals and researchers. Capture standardized recordings and obtain objective acoustic indices (AVQI, ABI, F0) for clinical documentation, research, and longitudinal voice monitoring. KEY FEATURES: • Standardized recording protocol (sustained vowel + connected speech) • Automatic AVQI (Acoustic Voice Quality Index) calculation • Automatic ABI (Acoustic Breathiness Index) calculation • Fundamental frequency (F0) analysis with visual contour • Report export in PNG and PDF formats • Complete evaluation history • Multilingual interface (Portuguese, English, Spanish, German, Italian) IDEAL FOR: • Speech-language pathology students and professionals • Otolaryngologists and voice clinics • Speech therapy researchers • Voice science laboratories • Voice professionals (singers, teachers, actors) working with their SLP SUBSCRIPTION PLANS: • Basic: Essential acoustic analysis features (3 free uses, then subscription required) • Professional: Advanced features + unlimited analyses + priority support + unlimited exports IMPORTANT TECHNICAL NOTES: • Requires internet connection for analysis (cloud-based Praat processing) • AVQI/ABI cutoff values were validated with laboratory-grade microphones, not phone microphones • Phone recordings use automatic gain control (AGC/AFC) and are more affected by background noise • Results must be interpreted with caution and in conjunction with complete clinical assessment • Best performance in quiet environment • Maintain consistent recording conditions for longitudinal monitoring PRIVACY & SECURITY: • Your data is encrypted and stored securely • GDPR compliant and health data regulations compliant • Voice recordings processed on secure servers • No data shared with third parties WHY VOXAPP? VoxApp brings professional-grade acoustic analysis tools directly to your smartphone, based on internationally validated protocols and acoustic indices used in clinical research worldwide. Designed for educational use and professional voice documentation. LEGAL & SUPPORT: Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.fonotechacademy.com/voxapp-privacy Support: fonotechacademy@gmail.com Download VoxApp now and enhance your voice analysis workflow for educational and research purposes! --- Developed by Fonotech Academy

Screenshots

MEMORY Karman Line4 screens
VoxApp4 screens

Verdict

The call

The clearest difference is in-app purchases: MEMORY Karman Line at none against VoxApp's 4. VoxApp's advantage is update cadence (every 2 months vs every 26 months) and iOS requirement (13.0 vs 15.0). On price, ads 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

Both are free to download. VoxApp sells 4 in-app purchases, starting at $2.99 per month. MEMORY Karman Line asks for nothing beyond the download.

UpkeepUpdate frequency

MEMORY Karman Line ships an update every 26 months, VoxApp every 2 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 3 level
MEMORY Karman Line versus VoxApp: the parameters behind the verdict, then further details
ParameterMEMORY Karman LineVoxApp
PriceFreeFree
Update frequencyEvery 26 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size104 MB26 MB
Age rating17+4+
DeveloperYellow RidersTiago Cruz

In-app purchases

None

MEMORY Karman Line

No in-app purchases

4 purchases

VoxApp

Subscriptions4
  • Basic Monthly$2.991 Month
  • Pro Monthly$6.991 Month
  • Basic Yearly$23.991 Year
Show 1 more
  • Pro Yearly$59.991 Year

Questions

Is MEMORY Karman Line free?
MEMORY Karman Line is free to download, with no in-app purchases.
Is VoxApp free?
VoxApp is free to download, with in-app purchases available.
Do MEMORY Karman Line or VoxApp have ads?
Neither MEMORY Karman Line nor VoxApp shows ads.
Which is updated more often, MEMORY Karman Line or VoxApp?
MEMORY Karman Line ships an update every 26 months, and VoxApp every 2 months. Most recently, MEMORY Karman Line was updated on October 25, 2026 and VoxApp on October 28, 2026.

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