Japality Limited · Hong Kong
Japality Limited is a limited company incorporated in Hong Kong. This page is its catalog of mobile apps. It does not take orders or payment. Download, price, advertising, in-app purchases, supported devices, and privacy details are on the App Store or Google Play listing for your region.
On 19 October 2026 this catalog matched Japality Limited’s App Store developer list in the United States and Hong Kong (31 apps) and the Google Play page for each Android app (30 apps). MolTouch had no Android package. Another country or device may still be unable to download a listed app.
Basic Japanese OTG and Gomoku OTG are not for sale in this catalog. Their App Store pages no longer open, and Basic Japanese OTG is not on Google Play. This page does not link to them.
The science apps are for study and exploration. They are not medical devices. A result is not a medical diagnosis and does not replace a laboratory or clinical check. Check primer pairs and splice calls in the lab before you rely on them.
港天氣 shows data sourced from the Hong Kong Observatory. It is not an Observatory product and is not endorsed by the Observatory. KongBus, named 港巴士 on the Hong Kong App Store, is not affiliated with or endorsed by bus operators, green minibus operators, or the Lands Department.
App Store and Google Play are run by their own operators. A link does not mean Apple or Google endorses Japality Limited or these apps.
This page does not collect personal data and does not take payment. For a product question, email info@japality.com and include the app name, platform, and version. Do not attach passwords, health information, or private files.
No app matches that search. Clear the text or choose All.
Sequence, chemistry, and chart tools that run on the phone or tablet. They are for study and exploration. They are not medical devices, and a result is not a medical diagnosis. Primer pairs and splice calls still need a lab check.
NewScience
On-device genome browser
Open a FASTA on iPhone, iPad, or Android, then add alignment, annotation, variant, and signal tracks such as BAM, GFF, VCF, and BigWig. Files stay on the device. It is a viewer, not a diagnostic tool.
NewScience
PCR primer design
Paste DNA or FASTA, check length, GC content, and an approximate melting temperature, then design ranked primer pairs on the device. Adjust product size, primer length, and how many pairs to return. Confirm candidates in the lab before you rely on them.
NewOpen sourceScience
On-device RNA-seq alignment
Align RNA-seq reads and explore splice sites on the device, with organism models included in the app. The Rust project is public on GitHub. Check the store listing for the current model set, and treat results as exploration rather than a finished analysis.
Science
FASTQ quality control
A pocket view of next-generation sequencing quality: per-base quality, GC content, and read length for FASTQ files, reviewed on the device.
Science
Chemical structure sketching
Draw chemical structures for study and personal use, with single, double, triple, wedge, and dash bonds, then import or export common formats. Not for safety-critical or regulatory decisions.
iOS onlyScience
3D molecular viewer · iPhone and iPad
Open a PDB or mmCIF file, or fetch a public PDB ID, then rotate the structure, change the drawing, and measure a distance, angle, or dihedral. There is no Android version.
NewScience
Set-overlap charts
Show how several sets overlap when a Venn diagram gets crowded. Each column is one combination. Import or export CSV and JSON, and share a PNG.
Science
Google Play name: Heatmap Creator
Turn a table of numbers into a color heatmap. Start from a blank grid, paste a table, or import CSV or TSV, then export a PNG or CSV. Projects stay in the app.
Science
Molar mass and mole calculator
A chemistry calculator for molar mass and mass-to-mole conversions, for study on the go. Extra modules depend on the version you have installed.
Science
Interactive periodic table
All 118 elements, with search, filters, and short quizzes for symbols and chemistry facts.
Science
Amino acid flashcards and codons
Learn the 20 standard amino acids with flashcards, quizzes, a codon table, and review of missed items. Built for biochemistry and biology students.
Science
Set diagrams and overlap stats
Build a Venn diagram from your own sets, read the intersections, and export an image or a data file for a class, a lab note, or a slide.
Japanese kana, vocabulary, and verb drills, with audio where the app provides it. Gojūon OTG can switch among English, Japanese, and Chinese.
Education
Google Play name: Japanese Verbs - Doushi Master
Practise Japanese verb forms — polite, te-form, negative, past, potential, passive, causative, conditional, and volitional — with graded drills and instant feedback.
Education
Japanese vocabulary
Study Japanese vocabulary with lists, audio, quizzes, and a record of how many words you have already learned.
Education
Hiragana and katakana · Google Play: Gojūon OTG - Japanese alphabet
Kana charts, pronunciation audio, and quizzes for seion, dakuon, handakuon, and yōon. The interface can run in English, Japanese, Simplified Chinese, or Traditional Chinese.
Everyday tools, including two Hong Kong apps. 港天氣 uses Observatory data and is not an Observatory product. KongBus is not affiliated with bus operators, green minibus operators, or the Lands Department.
NewUtilities
港巴士 on the Hong Kong App Store
Find Hong Kong bus and green minibus stops on the map and check nearby arrivals. Search a route or a place, and save stops you use. Not affiliated with the operators or the Lands Department.
NewUtilities
Hex viewer and byte editor
Open a local file and inspect bytes in hex, decimal, octal, or binary, with ASCII beside them. Search, compare two files, and export a C array, Rust array, hex string, or Base64. File contents are handled on the device.
Utilities
Google Play name: Unit Now: Fast Unit Converter
Convert length, mass, volume, temperature, and other everyday units, with optional currency conversion.
Utilities
Create and scan QR codes
Make QR codes for a link, text, email, phone, SMS, Wi-Fi, contact, or map location. Set colors, add a logo, and export PNG, JPG, or SVG. Scan with the camera or a photo. History stays on the device.
Utilities
Hide a message in a photo
Hide text or an image inside a photo and extract it later. Cover images and payloads are processed on the device; they are not uploaded to Japality.
Utilities
iOS and Android launcher icons
Produce common iPhone, iPad, and Android launcher icon sizes from one source image. Preview them, then export individual files or a ZIP.
Utilities
Hong Kong weather
A compact Hong Kong weather app using data sourced from the Hong Kong Observatory. Not affiliated with or endorsed by the Observatory.
Utilities
Google Play name: Flight Countdown: Flight Timer
See the time until departure or arrival, including on the Home Screen and Lock Screen, and keep a personal flight log. The countdown works in airplane mode. No account.
Utilities
Voice task list
Say a to-do, including a date and time, and keep it on a list with reminders. Voice-first, and no account required.
Short puzzles and arcade games that run offline. Gomoku OTG is no longer on the App Store.
Games
Google Play name: Color Vision Quest :Color Game
A quiet color puzzle: one tile is a slightly different shade. Tap it, then keep the streak going.
Games
Draw a circle, get a score
Draw a circle freehand. The app scores the attempt so you can try again in a few seconds.
Games
Fill a Sudoku solution
Enter a Sudoku grid and generate a solution, for checking your own work or getting through a stuck puzzle.
Games
Google Play name: Sudoku OTG - Brain Puzzle Game
Classic 9×9 Sudoku offline, from easy to expert, with notes, hints, undo, themes, and statistics. No account.
Games
Google Play name: Snake OTG -Classic Arcade Game
The arcade snake, with a classic mode and a battle mode, plus speed choices and high scores.
Games
Sokoban-style warehouse puzzles
Push every box onto a goal across 30 levels. You can push, not pull, and you can undo a bad move.
Games
Classic minesweeper
Open cells, place flags, and use the numbers. Beginner, intermediate, expert, and custom boards, with statistics.