Comparison

Audiologist vs NDST500A

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

Head to head

About

Audiologist

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IA(Intelligent Hearing Intelligence Audiology) platform technology is based on the research of hearing acoustics, phonetics, electroacoustics and signal and information processing. A new generation of intelligent acoustic signal processing technology combining DNN Deep Neural Network and ASP Auditory Scene Perception is proposed. In addition, the hardware platform of intelligent hearing enhancement technology realizes the data communication and interconnection between computers, mobile phones and hearing AIDS efficiently through high-quality high-speed DSP and Bluetooth Low Energy (BLE) wireless technology. The hearing enhancement algorithm based on supervised adaptive learning is used to imitate the hearing learning process of human beings by classification, and continuously accumulate data and improve itself, intelligently separate speech and noise, so as to significantly improve the speech comprehension ability of hearing impaired patients.

About

NDST500A

Features

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NDST500A is a application for Nakamichi Digital Sound Processor.

Screenshots

Audiologist4 screens

NDST500A4 screens

Verdict

The call

The clearest difference is iOS requirement: NDST500A at 9.0 against Audiologist's 14.0. On price, update cadence, 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

Audiologist ships an update every 3 months, NDST500A every 6 months. The most recent releases landed on September 8, 2026 and May 17, 2026 respectively.

Scorecard1 real difference · 5 level

Audiologist versus NDST500A: the parameters behind the verdict, then further details
Parameter	Audiologist	NDST500A
Price	Free	Free
Update frequency	Every 3 months — better	Every 6 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	14.0	9.0 — better
Further details — not scored
Size	10 MB	39 MB
Age rating	4+	4+
Developer	欧仕达听力科技(厦门)有限公司	Guangzhou Aidan Blessindo Electronic Co.,Ltd.

In-app purchases

None

Audiologist

No in-app purchases

None

NDST500A

No in-app purchases

Questions

Is Audiologist free?

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

Is NDST500A free?

NDST500A is free to download, with no in-app purchases.

Do Audiologist or NDST500A have ads?

Neither Audiologist nor NDST500A shows ads.

Which is updated more often, Audiologist or NDST500A?

Audiologist ships an update every 3 months, and NDST500A every 6 months. Most recently, Audiologist was updated on September 8, 2026 and NDST500A on May 17, 2026.