Comparison

JS.Notebook vs Mechanical Sound ID

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

Head to head

JS.Notebook

Free

🔧 Utilities

★ 5.01 ratingsView app →

About

JS.Notebook

Build, test, and run your JavaScript code directly on your iOS device. This utility allows you to execute scripts in widgets and even use your device as a host for computer browser code execution.

Highlights

Build JavaScript code
Test code at runtime
Run code in widgets
Use device as code host
Code execution in computer browser

Features

Read full description

JS Notebook provides a creative way for you to build and try out your Javascript. - Build, test, and check your code at runtime. - Easily run your code in Widgets - Read code in computer browse, make the iOS device to be a host.

About

Mechanical Sound ID

Features

Read full description

Identify machines from operating sounds ※Identified machines ・fan >air conditioner, mechanical fan ・vacuum cleaner ・printer ・microwave oven ・telephone ・hair dryer etc.

Screenshots

JS.Notebook4 screens

Mechanical Sound ID1 screens

Verdict

The call

The clearest difference is ads: JS.Notebook at none against Mechanical Sound ID's shown. Mechanical Sound ID's advantage is update cadence (fortnightly vs every 50 months). On price, in-app purchases, device support and iOS requirement 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

JS.Notebook ships an update every 50 months, Mechanical Sound ID fortnightly. The most recent releases landed on September 17, 2026 and August 3, 2026 respectively.

Scorecard2 real differences · 7 level

JS.Notebook versus Mechanical Sound ID: the parameters behind the verdict, then further details
Parameter	JS.Notebook	Mechanical Sound ID
Price	Free	Free
Rating	5.0 (1 ratings) — better	—
Number of ratings	1 — better	—
Update frequency	Every 50 months	Fortnightly — better
Ads	No — better	Yes
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	14.0 — better	15.8.3
Further details — not scored
Size	19 MB	36 MB
Age rating	4+	4+
Developer	Zijie Deng	Hideaki Uchikoshi

In-app purchases

None

JS.Notebook

No in-app purchases

None

Mechanical Sound ID

No in-app purchases

Questions

Is JS.Notebook free?

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

Is Mechanical Sound ID free?

Mechanical Sound ID is free to download, with no in-app purchases.

Do JS.Notebook or Mechanical Sound ID have ads?

Mechanical Sound ID shows ads; JS.Notebook does not.

Which is updated more often, JS.Notebook or Mechanical Sound ID?

JS.Notebook ships an update every 50 months, and Mechanical Sound ID fortnightly. Most recently, JS.Notebook was updated on September 17, 2026 and Mechanical Sound ID on August 3, 2026.