Open Outlook archives, right on your phone. Browse folders, messages and attachments inside any .pst file. Fully offline. No conversion, no uploads.
Coming Soon
Outlook .pst files are hard to open outside of Microsoft Outlook on Windows. If a colleague sends you a mail archive, or you have an old backup or an export from a corporate mailbox, the iPhone simply can't open it. PST Reader fixes that.
How it works: pick a .pst file from Files, iCloud Drive, or any document provider. The app parses it locally, with no cloud and no conversion step, and lets you walk through the folder tree, read messages with full HTML formatting, and preview attachments. Both modern Unicode (Outlook 2003+) and legacy ANSI archives are supported.
Built natively for iPhone, iPad and Mac. On Mac, you can pop messages into their own windows. Everything happens on the device, so your mailbox never leaves your machine.
Inbox, Sent Items, Deleted Items, custom folders. The entire Outlook hierarchy is preserved. Tap to drill down, swipe to go back. Folder counts and unread badges included.
HTML and rich-text bodies render with original styling. Headers, recipient lists, timestamps, and inline images all come through. Plain-text fallbacks for older messages.
Open PDFs, images, Office documents, and more straight from the message. Share or save attachments to Files using the native iOS share sheet.
Modern .pst files (Outlook 2003 and later) and legacy ANSI archives are both handled by a custom-built parser. No hidden conversion step, no data loss.
One purchase, every Apple device. The Mac version supports double-clicking a row to open a message in its own window, plus a proper Settings pane in the menu bar.
Recently opened archives stay one tap away. Bookmarked file references survive between launches so you don't have to navigate Files every time.
No PST file handy? Open the bundled demo mailbox to explore the app. Emails, contacts, and events included.
Files are processed entirely on-device. Nothing is uploaded, nothing is shared, and the app works in Airplane Mode. Your mailbox stays yours.
Pure Swift with SwiftUI, a single codebase across iPhone, iPad and Mac. The PST format is parsed by a hand-written, fully native parser: node and block B-trees, on-disk encryption (Compressible Encryption and High Encryption), both Unicode and ANSI variants, plus an LRU cache layer that keeps repeated message opens fast.
Premium entitlement is verified with StoreKit 2 via signed transactions, and a tamper-resistant counter (Keychain-backed) enforces the daily free read limit. Security-scoped bookmarks let recent files survive across launches without re-prompting. Multi-window message scenes on macOS round out the experience.
.pst fileMonthly subscription. Cancel anytime.
The free tier is enough to recover a few important emails. Premium is for users with large archives to comb through.
All parsing happens 100% on-device. .pst files are never uploaded, never copied to any server, and never shared with third parties. No account required. The app works fully offline.
Have feedback, questions, or need help? I'd love to hear from you: