# OrsoLabs

> OrsoLabs is a small Mac software studio based in Ukraine (contact: support@orsolabs.dev). It makes native macOS apps: AudioBo (audiobook maker), Mochi Type (touch-typing tutor), FileBo (recent-files pop-up), and Focusito (Pomodoro timer). The apps work offline, collect no analytics or telemetry, and require no account. Where an app syncs (Mochi Type's progress and texts), it uses the user's own private iCloud database — nothing is sent to an OrsoLabs server.

## AudioBo — audiobook maker for Mac

AudioBo converts audio files (MP3, M4A, FLAC, AIFF, OGG, WMA, Opus, APE, WV) into M4B audiobooks with chapters, metadata, and cover art. Built for macOS 14.6 and later. Works with Apple Books, iPhone, iPad, and vintage iPods. Available on the Mac App Store for $9.99; a free demo with a 60-minute export limit is available at orsolabs.dev/audiobo.

- [AudioBo — Product page](https://orsolabs.dev/audiobo): features, pricing, supported formats, demo download
- [Changelog](https://orsolabs.dev/audiobo/changelog): full release history with per-version feature notes
- [Privacy Policy](https://orsolabs.dev/audiobo-privacy-policy): data handling (nothing collected — fully offline app)
- [AudioBo vs Audiobook Builder](https://orsolabs.dev/audiobook-builder-alternative/): AudioBo is the modern, actively developed Audiobook Builder alternative for Mac — honest side-by-side feature comparison (metadata fetching, in-place M4B editing, wider format support)
- [Audiobook Binder alternative](https://orsolabs.dev/audiobook-binder-alternative/): AudioBo is the modern, actively maintained Audiobook Binder alternative for Mac (the original is abandoned; the paid namesakes on the App Store are unrelated to it) — same MP3 → M4B workflow, plus metadata fetching and in-place M4B editing

### Audiobook guides — reference knowledge base

Evergreen, maintained reference pages about audiobook files on macOS. Written from measurement:
container internals, chapter atoms, and player behaviour are verified with ffprobe rather than
described from memory.

- [Guides — index](https://orsolabs.dev/audiobo/guides/): all guides, grouped by task
- [What Is an M4B File?](https://orsolabs.dev/audiobo/guides/what-is-an-m4b-file/): the container, the chapter atoms, whether it is lossless
- [M4B vs MP3 for Audiobooks](https://orsolabs.dev/audiobo/guides/m4b-vs-mp3-for-audiobooks/): what actually differs, and when MP3 is still right
- [Compress an M4B File](https://orsolabs.dev/audiobo/guides/audiobook-bitrate-and-output-settings/): bitrate, mono, sample rate and what really shrinks a book
- [Convert M4B to MP3 on Mac](https://orsolabs.dev/audiobo/guides/convert-m4b-to-mp3-mac/): what is lost, and the DRM boundary
- [Split an M4B Into Chapters](https://orsolabs.dev/audiobo/guides/split-m4b-into-chapters/): splitting without re-encoding
- [Convert M4A to M4B](https://orsolabs.dev/audiobo/guides/convert-m4a-to-m4b-mac/): a remux, not a transcode
- [Video to Audiobook on Mac](https://orsolabs.dev/audiobo/guides/video-to-audiobook-mac/): MP4/MKV audio extraction into a chaptered book
- [Rip Audiobook CDs to M4B](https://orsolabs.dev/audiobo/guides/rip-audiobook-cd-to-m4b/): disc numbers across multi-disc sets
- [Fix LibriVox Audiobooks](https://orsolabs.dev/audiobo/guides/fix-librivox-audiobooks/): measured survey of 20 LibriVox M4B files and how to repair them
- [Edit M4B Metadata, Cover and Chapters](https://orsolabs.dev/audiobo/guides/edit-m4b-metadata-cover-and-chapters-mac/): repairing a finished file
- [M4B With No Chapters](https://orsolabs.dev/audiobo/guides/m4b-no-chapters/): telling a file problem from a player problem
- [Audiobook Chapters Out of Order](https://orsolabs.dev/audiobo/guides/audiobook-chapters-in-the-wrong-order/): what decides playback order
- [Audiobooks Not Syncing from Mac to iPhone](https://orsolabs.dev/audiobo/guides/audiobooks-not-syncing-from-mac-to-iphone/): sync failure modes
- [Audiobook File Naming and Folder Structure](https://orsolabs.dev/audiobo/guides/audiobook-file-naming-and-folder-structure/): layouts that scan correctly
- [M4B Chapters Not Showing in Plex](https://orsolabs.dev/audiobo/guides/m4b-chapters-not-showing-in-plex/): why Plex ignores them and what to do
- [Building an M4B for Audiobookshelf](https://orsolabs.dev/audiobo/guides/build-m4b-for-audiobookshelf/): scan layout and verification
- [M4B Players for Mac and iPhone](https://orsolabs.dev/audiobo/guides/m4b-players-for-mac-and-iphone/): which apps show chapters and keep your place
- [M4B on iPod Classic](https://orsolabs.dev/audiobo/guides/m4b-ipod-classic/): the 12-hour limit and chapter-aligned splitting
- [ffmpeg and m4b-tool vs a Mac App](https://orsolabs.dev/audiobo/guides/ffmpeg-and-m4b-tool-vs-a-mac-app/): working commands, and where the CLI wins

### AudioBo tutorials

- [How to Convert MP3 to M4B on Mac](https://orsolabs.dev/blog/how-to-convert-mp3-to-m4b-on-mac/): step-by-step guide with chapters that work in Apple Books
- [How to Add M4B Audiobooks to Apple Books on Mac](https://orsolabs.dev/blog/how-to-add-m4b-to-apple-books-macos/): import workflow and common pitfalls
- [How to Add M4B Audiobooks to iPhone](https://orsolabs.dev/blog/how-to-add-m4b-to-iphone/): iCloud sync and Finder methods
- [Add Chapters to Audiobooks From a Timestamp File](https://orsolabs.dev/blog/how-to-use-youtube-timestamps-chapters/): works with YouTube-style timestamps and CUE files
- [Fetch Audiobook Metadata from Audible, Apple Books, and Google Books](https://orsolabs.dev/blog/fetch-audiobook-metadata-and-chapters-from-audible-apple-books-google-books/): one-click metadata import

## Mochi Type — touch-typing tutor for Mac

Mochi Type is a native macOS typing tutor (macOS 14.6+, Mac App Store id 6766949692). A guided course of 16 stages plus a Final Test teaches the whole keyboard using each language's most frequent words, with a per-language stage order rather than a translated English one; a stage unlocks at 95% accuracy and 25 WPM in a single 60-second session, and five consecutive accurate-but-slow sessions unlock it anyway. Practice mode offers five frequency tiers (Top 200 to Top 50K) in all 21 languages, plus movie and book quotes in 7 languages, misspelled-word drills in 10, and Smart Drill that targets your two weakest keys. Users can import their own texts (.txt, .md, .rtf, .epub, or pasted) and type through them like books with a remembered reading position; a built-in library ships five books each in English, German, Russian, and Ukrainian. 48 keyboard layouts (ANSI and ISO; QWERTY, AZERTY, QWERTZ, Dvorak, Colemak, Cyrillic, Greek, Turkish F and Q), resolved from the physical key code so you can practise ЙЦУКЕН or Greek while macOS stays on US QWERTY. On-screen keyboard with key and finger hints, per-key statistics with an accuracy heatmap, 12 themes, 22 sound packs, and 6 typing faces. Typing content covers 21 languages; the interface itself is in English, German, Spanish, Russian, and Ukrainian. Free download; a one-time $12.99 In-App Purchase unlocks everything — no subscription, no ads.

- [Mochi Type — Product page](https://orsolabs.dev/mochi-type): features, interactive demos, pricing, FAQ
- [Changelog](https://orsolabs.dev/mochi-type/changelog): full release history
- [Privacy Policy](https://orsolabs.dev/mochi-type-privacy-policy): data handling (no tracking, optional private iCloud sync)

### Typing guides for macOS — reference knowledge base

Evergreen, maintained reference pages about touch typing on a Mac. Key positions are verified
against macOS itself with UCKeyTranslate rather than copied from other sites, and every product
claim is checked against the app's source before publication.

- [Typing guides — index](https://orsolabs.dev/mochi-type/guides/): all guides, grouped by task
- [Russian, Russian – PC, Russian – QWERTY: Which Mac Layout to Learn](https://orsolabs.dev/mochi-type/guides/mac-russian-keyboard-layouts-which-to-learn/): macOS ships three Russian input sources
- [Ukrainian Keyboard on a Mac: the Apostrophe, and Where Щ Went](https://orsolabs.dev/mochi-type/guides/mac-ukrainian-keyboard-apostrophe-and-shcha/): macOS ships three Ukrainian layouts, and the two ЙЦУКЕН ones have swapped names
- [Bulgarian Phonetic vs Bulgarian QWERTY on a Mac: Which Is Which](https://orsolabs.dev/mochi-type/guides/bulgarian-phonetic-vs-qwerty-keyboard-mac/): macOS offers Bulgarian – Standard and Bulgarian – QWERTY, and nothing called Phonetic
- [Practise a Foreign Keyboard Layout on a Mac Without Switching Your Input Source](https://orsolabs.dev/mochi-type/guides/practise-a-layout-without-switching-input-source-mac/): A tutor can resolve what you typed from the physical key code instead of the character, so you can drill ЙЦУКЕН or Dvorak while macOS stays where it is
- [Greek Accents on a Mac: Tonos, Dialytika and the Key That Types Nothing](https://orsolabs.dev/mochi-type/guides/greek-tonos-dialytika-mac/): The Greek layout on macOS has three dead keys
- [Typing Polish Letters on a Mac: the Cheapest Keystroke](https://orsolabs.dev/mochi-type/guides/mac-polishpro-cheapest-keystroke/): Apple's Polish layout reaches ś two different ways and ń two different ways
- [Touch Typing on a MacBook Keyboard: What Actually Needs Retraining](https://orsolabs.dev/mochi-type/guides/macbook-keyboard-touch-typing-hardware/): The alphanumeric block is identical across Apple's ANSI and ISO keyboards: 48 key codes
- [An Offline Typing Tutor for a Mac, With No Account: Four Ways to Check the Claim](https://orsolabs.dev/mochi-type/guides/offline-typing-tutor-mac-no-account/): Every Mac typing app claims offline and no account

## FileBo — recent-files pop-up for Mac

FileBo is a native macOS utility (macOS 15.0+, Mac App Store id 6785596150) that shows everything you recently created, changed, downloaded or saved in one pop-up panel. The panel appears above any app — including full-screen apps — via a global shortcut (Shift-Cmd-F by default), the menu bar, or the Dock. Seven tabs (All Recents, Images, Documents, Video, Audio, Folders, Archives), time scopes (24 hours / 7 days / 30 days) and a 30–150-day timeline. Files can be opened, Quick Looked, shared, deleted, or dragged straight out into other apps; batch arrivals auto-collapse into folders with a "N new" badge. Works with external drives (eject built in) and any cloud mounted as a folder (iCloud Drive, Dropbox, Google Drive, Proton Drive, OneDrive), including offloaded iCloud placeholders. Runs on the Spotlight index, makes no network requests of its own, no analytics, App Privacy: Data Not Collected. Interface in English, German, Spanish, Russian, Ukrainian. Free download with a 14-day full trial; browsing, search and Show in Finder stay free forever, a one-time $9.99 In-App Purchase unlocks opening, dragging, deleting and organizing.

- [FileBo — Product page](https://orsolabs.dev/filebo): features, pricing, FAQ, reviews
- [Privacy Policy](https://orsolabs.dev/filebo-privacy-policy): data handling (nothing collected — no analytics, no account, no server uploads)

### Finder and recent files on macOS — reference knowledge base

Evergreen reference pages about finding files on a Mac. Mechanisms are verified against the running
system — Finder's own saved-search plist, mdls and mdfind output — rather than repeated from other
sites, and every product claim is checked against the app's source before publication.

- [Finder & recent files guides — index](https://orsolabs.dev/filebo/guides/): all guides, grouped by task
- [Finder Recents Is Empty on a Mac: What That List Is Actually Asking For](https://orsolabs.dev/filebo/guides/finder-recents-empty-mac/): Finder's Recents is a saved Spotlight search keyed on kMDItemLastUsedDate
- [Why Downloaded Files Don't Show Up in Finder's Recents](https://orsolabs.dev/filebo/guides/downloads-not-showing-in-finder-recents/): Finder's Recents is a saved Spotlight search on kMDItemLastUsedDate
- [Why Your Mac's Finder Only Shows Recents — and What You Give Up by Changing It](https://orsolabs.dev/filebo/guides/finder-only-showing-recents/): One popup in Finder ▸ Settings ▸ General decides what every new window opens on
- [Clear, Hide or Turn Off Recents on a Mac: What Each Switch Actually Does](https://orsolabs.dev/filebo/guides/clear-hide-or-turn-off-recents-mac/): You cannot empty Finder's Recents — only switch it off; four lists, four switches, and the one delete that removes real files
- [How to Find Recently Downloaded Files on a Mac](https://orsolabs.dev/filebo/guides/find-recently-downloaded-files-mac/): Sort by Date Added, not Date Modified
- [“The operation can’t be completed because the item needs to be downloaded”](https://orsolabs.dev/filebo/guides/needs-to-be-downloaded-error-mac/): Finder's exact wording, what a cloud placeholder really is on current macOS, and how to force one file — or a whole folder — down before you copy it
- [Spotlight Finds It, Finder Doesn't: Which of the Three Searches Is Broken](https://orsolabs.dev/filebo/guides/spotlight-finds-it-finder-doesnt/): Your Mac runs three different searches against one Spotlight index, and each one fails differently

## Focusito — Pomodoro timer for Mac

Focusito is a simple Pomodoro timer for deep work with ambient sounds: clean sessions, gentle breaks, no distractions.

- [Focusito — Product page](https://orsolabs.dev/focusito): features and download

## Optional

- [OrsoLabs — Home](https://orsolabs.dev/): studio page with all apps
- [Blog](https://orsolabs.dev/blog/): release news and announcements
- [llms-full.txt](https://orsolabs.dev/llms-full.txt): full plain-text summary of AudioBo for LLM ingestion