Oltek — Text & Code Viewer

Oltek reads documents and source code as text on iPhone and native Mac.

FILES AND ENCODINGS
• TXT, TEXT, MD, LOG, RTF and EPUB.
• Plain-text code, configuration and data files: Swift, Python, JavaScript, TypeScript, C/C++, Java, Kotlin, Rust, Go, HTML/CSS, JSON, YAML, XML, CSV and more, including extensionless text files.
• Code preserves indentation, tabs and blank lines in a monospaced font. No execution, editing or syntax highlighting. PDF, Office documents and other binary formats are not supported.
• Auto-detect or choose an encoding provided by the device: Unicode, CP949/EUC-KR, Shift_JIS/EUC-JP, GB18030/Big5, Windows, ISO, KOI8 and others. Some encodings require manual selection.
• Preview a different encoding and create a new copy while keeping existing copies and reading records.
• RTF and EPUB show body text without formatting or media. EPUB follows package reading order. DRM-protected or encrypted text is not supported.

READING AND NAVIGATION
• Scroll or paged reading; text search, bookmarks and saved positions.
• Automatically detect chapter headings and search the chapter list.
• Drag the position bar to preview text and the detected chapter; release to jump. Return to the position before a search, chapter or position jump.
• Choose swipe, side tap/click or both. Arrow-key paging; iPhone requires a hardware keyboard.
• Native Mac keyboard shortcuts and adjustable text width. Apple Silicon and Intel support.
• System, light and dark appearance, font size and line spacing.
• UI in English, Korean, Japanese, Simplified/Traditional Chinese, Spanish, French and German. Imported text is not translated.

LOCAL STORAGE
Plain text is stored inside the app as an original-byte copy and a UTF-8 reading copy. RTF and EPUB store extracted body text. Original files are unchanged, and later original-file changes do not automatically update imported copies. Earlier-version imports require importing the original again for encoding previews.
Files, positions, bookmarks and settings stay on each device. No iPhone–Mac sync. Large-file processing depends on device memory and performance.
No account, ads or in-app purchases.