Keepstone: Time Capsule Diary
Seal memories for later
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Free
In-App Purchases
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About
Keepstone is a private journal for memories you want to preserve, seal, and rediscover later.
Write a memory, add photos or voice notes, lock it until a future date, or create a letter to your future self. Your journal stays local on your device: no account, no cloud sync, no social feed.
WRITE
Capture daily thoughts, meaningful moments, photos, and voice notes in a calm writing space.
SEAL
Lock memories until a future date. Create personal time capsules or letters to your future self.
ORGANIZE
Use tags, search, themes, typography, and journal statistics to shape your archive over time.
EXPORT
Create password-protected .kstone files, encrypted backups, and PDF exports for unlocked memories.
PRIVATE BY DESIGN
Your data stays local on your device. Keepstone does not require an account to write, seal, import, export, or read your memories.
SUPPORTER
Keepstone includes an optional one-time Supporter upgrade for premium themes, typography, full journal statistics, and PDF export.
Keepstone is built for memory, privacy, and time.
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What's New in Keepstone
1.7.10
August 7, 2026
Keepstone 1.7.10 makes image memories easier to create and improves localization around upload flows. You can now select multiple images at once when adding photos to a memory, instead of adding them one by one. Each memory supports up to 10 images, keeping entries comfortable to open, edit, and export. Image-upload alerts now use the selected app language, and iOS permission prompts have localized text for supported languages. The app also better propagates your selected language to web and native picker flows.
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Subscriptions & In-App Purchases
$0.99
Keepstone Supporter
Unlocks Paper, Opal themes and PDF export forever.
