Keepstone: Time Capsule Diary

About this app

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.

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.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Sep 4, 2026 · 12:31 PM Free