Independent product studio

SECOND WIND LIMITEDSoftware for the way you work, learn, and play.

We build focused mobile and Web products for scanning documents, studying smarter, creating with voice, discovering nature, and bringing characters to life.

Explore our products Contact us

FreeScanner

Scan, edit, search, and organize PDFs on your phone, then continue with synced documents in a focused private Web workspace.

Learn more Official website Open Web workspace

Paper, photo, or existing PDFScan on mobile. Organize on the Web.

Local-first captureScan or import pages, correct edges, rotate, reorder, and create PDFs even without an account.

Searchable documentsFind documents by name or recognized text, then open the page that contains the match.

Continue on the WebOptionally sync completed documents to rename files, reorder pages, download PDFs, or delete them in a browser.

Study and listening app

StudyFold

Turn PDFs, scans, web pages, and pasted text into clear audio, useful summaries, and reading progress you can return to.

Learn more Privacy Policy Terms of Use

StudyFold is the product name; current legal documents use the CleanRead AI name.

PDF, scan, web page, or text Read, listen, summarize, and continue.

Flexible importAdd PDFs, DOCX files, scans, links, notes, and screenshots.

Read or listenChoose a voice and speed, then continue away from your desk.

Study in contextKeep audio, summaries, course groups, and progress with each document.

Mobile utility app

BirdLens

Identify birds from photos and sounds, discover nearby species, and keep a smarter record of every sighting.

Learn more Official website

Image and sound IDRecognize species from field photos or recordings.

Nearby discoveryUse location-aware tools to find birds around you.

History and enhancementReview identifications and improve bird photos with super resolution.

Professional TTS

EchoVox

Create natural multilingual voiceovers and clone brand voices for creators, studios, apps, and enterprises.

Learn more Open EchoVox

One voice. Many markets.

Designed for fast script edits, long-form narration, product localization, audio ads, podcasts, and AI agents.

English简体中文日本語Español

“Update the script. Keep the voice. Ship the audio.”

Studio-grade delivery for product demos, games, learning content, and daily broadcasts.

AI game

Picwar

Turn ideas into heroes, send them into text RPG battles, and grow characters that can fight, talk, and remember.

Learn more Official website

AI creationGenerate heroes from images, prompts, classes, factions, and backstories.

Text battle simulatorAutomatic battles become dramatic, readable combat reports.

Hero TalkCharacters react, reflect, and develop personality through play.

Fictional character chat

OshiMuse

Create or discover fictional characters, exchange messages and photos, and build relationships that carry memories into what happens next.

Learn more Official website Support

Create your characterChoose a name, appearance, personality, backstory, and boundaries.

Keep the shared contextSave and manage memories and relationship milestones across conversations.

Stay in controlChoose proactive messages and quiet hours, or use blocking and reporting controls.

18+ · Free to start · Coming to iPhone and Android

Independent decision support

Start with the workflow, not the feature count

Use our source-linked comparisons and migration guides to choose the right boundary for scanning, bird identification, study audio, and voice production. Each page names our publisher affiliation, links current official sources, and explains when a competing product may be the better fit.

Scanner migration A practical Microsoft Lens alternative after retirement

Compare practical Microsoft Lens replacements after its 2026 retirement, including local PDF scanning, OCR, OneDrive, Adobe Scan, and FreeScanner.

Reviewed 2026-07-24 Document scanners FreeScanner vs CamScanner: choose the workflow boundary

Compare FreeScanner and CamScanner for mobile scanning, searchable PDFs, OCR, accounts, cloud sync, document tools, privacy boundaries, and cost fit.

Reviewed 2026-08-15 Bird identification BirdLens vs Picture Bird: identify, explore, and verify

Compare BirdLens and Picture Bird for photo and sound identification, nearby discovery, reference content, saved history, photo tools, and expert help.

Reviewed 2026-08-15 Voice production EchoVox vs NaturalReader: reading tool or voice studio?

Compare EchoVox with NaturalReader Personal and Commercial for reading documents, producing voiceovers, OCR, voices, licensing, APIs, and review.

Reviewed 2026-08-15 Study and listening StudyFold vs Speechify: organize the source or read anything aloud

Compare StudyFold and Speechify for listening to PDFs, OCR, voices, speed, summaries, quizzes, source organization, course context, device access, and study flow.

Reviewed 2026-08-15

Global by default

The homepage supports eight major languages.

Choose any language below. Each one has a dedicated SEO-friendly page.

Company

Built by SECOND WIND LIMITED.

We build practical mobile and Web products for documents, learning, creative work, and discovery.

SECOND WIND LIMITED is a Hong Kong product studio building focused mobile and Web software. FreeScanner turns paper into searchable PDFs and lets signed-in users continue in a private browser workspace. BirdLens identifies birds from photos and sounds. StudyFold turns demanding reading into organized text, summaries, and audio. EchoVox creates multilingual speech for production work, while Picwar turns prompts and images into playable characters and text battles. Each product starts with a specific job instead of a broad AI promise. This official company site connects those products to their verified websites, store listings, support contacts, and legal documents so users can identify the publisher, compare the portfolio, and find the correct destination before installing an app or creating an account.

Legal NameSECOND WIND LIMITED
Registered AddressRM 532B 5/F STAR HSE, 3 SALISBURY RD, Tsim Sha Tsui, Hong Kong
Emailsupport@secondwindltd.xyz