Comparison

JavaScript Manual vs hexJapality

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

Head to head
About

JavaScript Manual

An offline, ad-free guide to JavaScript, covering its core guide, built-in objects, and Web API. Access comprehensive documentation without an internet connection.

Highlights
  • JavaScript guide
  • Built-in objects
  • Web API documentation
  • Offline access
  • Ad-free experience
Features
Read full description

JavaScript Manual - Complete Offline Reference Your go-to companion for JavaScript development. Read everything from ES6+ basics to Web APIs anytime, anywhere - fully offline. Three core modules: - JavaScript Guide: variables, functions, closures, async/await, prototypes and modern ES6+ syntax - Built-in Objects: Array, Object, String, Number, Date, RegExp, Map, Set, Promise and more, with methods and examples - Web API: DOM, Fetch, Storage, Canvas, WebSocket and browser interfaces Why developers love it: - 100% offline - all content stored on your device - Zero ads - clean, distraction-free reading - Lightweight and fast - built for quick lookups Perfect for learning, coding reference, interview prep, and offline study. Questions or feedback? Contact: devspera@outlook.com

About

hexJapality

Features
Read full description

hexJapality is a mobile hex viewer and binary inspection toolbox for developers, students, and technical users who need to explore files at the byte level. Open local files on your device, move through offsets, and view bytes in HEX, DEC, OCT, or BIN with printable ASCII alongside the raw data. Select any byte to inspect common interpretations including unsigned integers, signed integers, floats, binary, hex, and ASCII. Built-in tools help you understand file structure faster: • Edit individual bytes with undo and redo before saving • Search for text or exact hex byte patterns • View file size, MD5, and SHA-256 • Detect common formats such as PNG, JPEG, PDF, ZIP, ELF, and GIF • Explore entropy and byte distribution maps • Scan for readable strings and jump to offsets • Add bookmarks for important locations • Compare two files with Binary Diff • Export bytes as a C array, Rust array, hex string, or Base64 Privacy: Files you open are processed on your device. We do not upload your file contents to our servers. Free version: The app is free to download and may display ads. You can subscribe to Remove Ads (monthly or yearly) in Settings to enjoy an ad-free experience while your subscription is active. Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID subscription settings. Restore purchases is available in the app. Use responsibly: You are responsible for files you open, edit, or export. Always back up important data before editing. Terms of Use (EULA): https://app.japality.com/hexjapality/i/terms_of_use/ Privacy Policy: https://app.japality.com/hexjapality/i/privacy_policy/ Support: https://app.japality.com/hexjapality/i/support/ hexJapality is provided by Japality Limited (Hong Kong). Designed for quick checks and byte-level inspection on mobile.

Screenshots

JavaScript Manual4 screens
hexJapality4 screens

Verdict

The call

The clearest difference is in-app purchases: JavaScript Manual at none against hexJapality's 2. JavaScript Manual also leads on ads (none vs shown). hexJapality's advantage is update cadence (every 2 months vs every 31 months) and iOS requirement (13.0 vs 15.0). On price 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. hexJapality sells 2 in-app purchases, starting at $1.99 per month. JavaScript Manual asks for nothing beyond the download.

UpkeepUpdate frequency

JavaScript Manual ships an update every 31 months, hexJapality every 2 months. The most recent releases landed on September 20, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
JavaScript Manual versus hexJapality: the parameters behind the verdict, then further details
ParameterJavaScript ManualhexJapality
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 31 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.013.0 — better
Further details — not scored
Size34 MB44 MB
Age rating4+4+
DeveloperHua YangJapality Limited

In-app purchases

None

JavaScript Manual

No in-app purchases

2 purchases

hexJapality

Subscriptions2
  • Remove Ads (Monthly)$1.991 Month
  • Remove Ads (Yearly)$9.991 Year

Questions

Is JavaScript Manual free?
JavaScript Manual is free to download, with no in-app purchases.
Is hexJapality free?
hexJapality is free to download, with in-app purchases available.
Do JavaScript Manual or hexJapality have ads?
hexJapality shows ads; JavaScript Manual does not.
Which is updated more often, JavaScript Manual or hexJapality?
JavaScript Manual ships an update every 31 months, and hexJapality every 2 months. Most recently, JavaScript Manual was updated on September 20, 2026 and hexJapality on October 3, 2026.

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