Comparison

IHSIM vs ENTwise

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

Head to head
About

IHSIM

This application simulates acoustic hearing loss and cochlear implant processing in real-time. It allows for custom spectral filtering based on audiograms and offers various cochlear implant simulation parameters. Designed for research and education, it helps users understand auditory perception.

Highlights
  • Acoustic hearing loss simulation
  • Cochlear implant simulation
  • Custom spectral filtering
  • Filterbank vocoder
  • Binaural stimulation options
  • Research and educational use
Features
Read full description

IMPAIRED HEARING SIMULATION (IHSIM) This app performs separate simulations of acoustic hearing loss and cochlear implant processing. These simulations process the audio input from the iOS device in real-time. In the acoustic hearing loss simulation, a user can achieve custom spectral filtering based on a listener's audiogram. Six presets are also provided of common audiogram functions. A dynamic range compressor is included, along with a frequency smearing algorithm to flatten the signal's spectrum and perform subtle pitch modulation. In the cochlear implant simulation, a filterbank vocoder is implemented. The number of frequency bands is selectable, along with the carrier signal (noise or sine wave vocoder), the frequency divisions (Logarithmic or Greenwood function), and the overall bandwidth. Electric-only and "hybrid" acoustic-electric cochlear implants are modeled. Several monaural and binaural stimulation options are selectable. HEADPHONES AND SENNHEISER SMART AMBEO HEADSET This app was created as part of the Sennheiser Developers Program for the Smart AMBEO Headset. The app is capable of processing a stereo input signal, taking advantage of the "augmented reality" features of the headset. The app is also fully-functional using a conventional set of headphones with a mono microphone input. It is highly recommended to use headphones of some type with the app. FOR RESEARCH AND EDUCATIONAL PURPOSES The intended use of the app is for auditory perception research. The app may have additional educational purposes related to hearing loss. The app should not be used for medical purposes. INFORMATION Resources related to the app are available at: hackaudio.com

About

ENTwise

Features
Read full description

ENTwise is a question bank for otolaryngology board preparation and clinical review. WHAT'S INSIDE - 1,550 clinical questions - 4 subspecialties: Laryngology, Rhinology, Otology, Head & Neck Surgery - Bilingual support: English & Turkish - 3 difficulty levels: Easy, Medium, Hard - Light and dark mode HOW IT WORKS - Start a practice session by selecting subspecialties, topics and difficulty - Answer questions with instant feedback, no submit button needed - See detailed explanations for every answer option, plus a short key concept for each question - Choose to see explanations after each question or at the end of the session SMART STUDY FEATURES - Filter by subspecialty, topic, difficulty, or custom combinations - Mark favorites and revisit questions you answered incorrectly - Session-based practice with a customizable question count - Review every question after each session - Performance statistics by subspecialty and difficulty BUILT FOR - ENT residents preparing for board exams - Medical students studying otolaryngology - Practicing physicians refreshing clinical knowledge - International doctors preparing for equivalency exams ONE-TIME PURCHASE - No subscription. Pay once and get access to all 1,550 questions. - If you installed an earlier free version, you keep a free set of 40 questions and can unlock everything with a one-time in-app purchase. - Existing subscribers keep full access while their subscription is active. Study smarter. Download ENTwise today. Disclaimer: ENTwise is intended for educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ent-wise.netlify.app/privacy.html

Screenshots

IHSIM4 screens
ENTwise4 screens

Verdict

The call

The clearest difference is in-app purchases: IHSIM at none against ENTwise's 1. IHSIM also leads on iOS requirement (9.3 vs 16.0). On price, update cadence, 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. ENTwise sells 1 one-off in-app purchase. IHSIM asks for nothing beyond the download.

UpkeepUpdate frequency

IHSIM ships an update monthly, ENTwise fortnightly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 8 level
IHSIM versus ENTwise: the parameters behind the verdict, then further details
ParameterIHSIMENTwise
PriceFreeFree
Rating3.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.3 — better16.0
Further details — not scored
Size5 MB6 MB
Age rating4+17+
DeveloperHack Audio LLCMEHMET ENES ARICI

In-app purchases

None

IHSIM

No in-app purchases

1 purchases

ENTwise

One-time1
  • ENTwise Premium Lifetime$39.99

Questions

Is IHSIM free?
IHSIM is free to download, with no in-app purchases.
Is ENTwise free?
ENTwise is free to download, with in-app purchases available.
Do IHSIM or ENTwise have ads?
Neither IHSIM nor ENTwise shows ads.
Which is updated more often, IHSIM or ENTwise?
IHSIM ships an update monthly, and ENTwise fortnightly. Most recently, IHSIM was updated on November 2, 2026 and ENTwise on November 5, 2026.

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