Comparison

P.A.R.T. vs Herz Hz

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

Head to head
About

P.A.R.T.

This platform allows researchers to design, configure, and test cognitive and auditory assessment protocols. It provides a development environment for refining assessment batteries before use in human subject research.

Highlights
  • Design environment for 100+ assessment types
  • Psychoacoustical, neuropsychological, executive function tests
  • Adaptive algorithm configuration
  • Customizable assessment flows
  • Detailed data logging
  • Protocol validation tools
Features
Read full description

Welcome to Portable Automated Rapid Testing (PART) - A Research Development Platform PART is a specialized tool designed exclusively for researchers and developers to create, configure, and test cognitive and auditory assessment protocols. This platform is NOT intended for conducting human subject research directly, but rather serves as a development environment where researchers can design and refine assessment batteries before implementing them in IRB-approved studies. Key features of PART: - Design environment for over 100 assessment types, including psychoacoustical, neuropsychological, executive function, attentional control, and visual processing tests - Advanced configuration options for adaptive algorithms and testing parameters - Comprehensive scripting system for customizing assessment flows - Detailed data logging capabilities for protocol validation PART was developed by the Brain Game Center for Mental Fitness and Well-being at Northeastern University (formerly UC Riverside) and has been supported by grants from the NIH, DOD, and AERDF.

About

Herz Hz

Features
Read full description

Welcome to Herz Hz Your personal companion for sound comfort and auditory calm. Herz Hz is designed to gently support you through the challenges of sound sensitivity, persistent ringing, or buzzing—so you can regain focus, calm, and daily peace. What Herz Hz Offers Guided Conversations for Calm: Engage in thoughtful, guided chats designed for mindful reflection and sound comfort. You’ll never feel lectured—just heard, supported, and empowered. Mindful Reflection: Work step-by-step through moments of discomfort with our AI, helping you reframe negative thoughts and find inner calm. Personalized Check-Ins: Track your comfort and focus levels over time with simple self-reflection prompts, helping you notice patterns and find what brings you ease. Context-Aware Support: Whether you're at work, at home, or trying to fall asleep, Herz Hz adapts to your situation to provide relevant, calming support. Safe & Confidential: Herz Hz is a safe, private space to support your daily wellness and sound comfort journey. You’re not alone—and you’re not stuck Herz Hz is here to help you gently shift your focus, regain peace of mind, and build resilience. Whether you’re seeking a moment of relaxation or looking for daily support, we’re here to walk with you, one conversation at a time. Start your journey with Herz Hz today. Because silence may not always be possible—but peace is. Herz Hz is a wellness app designed for relaxation and sound comfort. It is not a medical device and does not provide medical diagnosis, treatment, or advice. Always consult a qualified healthcare professional before making any medical decisions. If you are experiencing a medical emergency, please contact emergency services immediately.

Screenshots

P.A.R.T.4 screens
Herz Hz4 screens

Verdict

The call

The clearest difference is update cadence: Herz Hz at every 9 days against P.A.R.T.'s every 2 months. P.A.R.T.'s advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

P.A.R.T. ships an update every 2 months, Herz Hz every 9 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 6 level
P.A.R.T. versus Herz Hz: the parameters behind the verdict, then further details
ParameterP.A.R.T.Herz Hz
PriceFreeFree
Rating4.6 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.6
Further details — not scored
Size181 MB70 MB
Age rating4+17+
DeveloperNortheastern University Information ServicesEVOCO LABS CO., LTD.

In-app purchases

None

P.A.R.T.

No in-app purchases

None

Herz Hz

No in-app purchases

Questions

Is P.A.R.T. free?
P.A.R.T. is free to download, with no in-app purchases.
Is Herz Hz free?
Herz Hz is free to download, with no in-app purchases.
Do P.A.R.T. or Herz Hz have ads?
Neither P.A.R.T. nor Herz Hz shows ads.
Which is updated more often, P.A.R.T. or Herz Hz?
P.A.R.T. ships an update every 2 months, and Herz Hz every 9 days. Most recently, P.A.R.T. was updated on October 24, 2026 and Herz Hz on October 6, 2026.

Other comparisons