Comparison

Keepstone vs Time Capsule

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Keepstone

Features
Read full description

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.

About

Time Capsule

Features
Read full description

Send a message to your future self or loved ones. Time Capsule lets you create meaningful messages that unlock at a specific date and time in the future. Whether it's a reminder, a promise, or words of encouragement, preserve your thoughts and feelings for tomorrow. KEY FEATURES: - Schedule messages for any future date and time - Send capsules to friends and family - Beautiful, intuitive interface - Secure and private - your messages are encrypted - Get notified when capsules are ready to open - Share memories and moments across time PERFECT FOR: - Birthday wishes sent months in advance - New Year's resolutions to open next year - Anniversary messages for loved ones - Future reminders to yourself - Preserving special moments Download Time Capsule today and start creating memories for tomorrow.

Screenshots

Keepstone4 screens
Time Capsule4 screens

Verdict

The call

The clearest difference is in-app purchases: Time Capsule at none against Keepstone's 1. Time Capsule also leads on iOS requirement (13.0 vs 15.0). Keepstone's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Keepstone sells 1 one-off in-app purchase. Time Capsule asks for nothing beyond the download.

UpkeepUpdate frequency

Keepstone ships an update every 6 days, Time Capsule every 3 days. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

Scorecard3 real differences ยท 3 level
Keepstone versus Time Capsule: the parameters behind the verdict, then further details
ParameterKeepstoneTime Capsule
PriceFreeFree
Update frequencyEvery 6 daysEvery 3 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 โ€” better
Further details โ€” not scored
Size18 MB25 MB
Age rating4+4+
DeveloperPablo SilvaSubin Jo

In-app purchases

1 purchases

Keepstone

One-time1
  • Keepstone Supporter$0.99
None

Time Capsule

No in-app purchases

Questions

Is Keepstone free?
Keepstone is free to download, with in-app purchases available.
Is Time Capsule free?
Time Capsule is free to download, with no in-app purchases.
Do Keepstone or Time Capsule have ads?
Time Capsule shows ads; Keepstone does not.
Which is updated more often, Keepstone or Time Capsule?
Keepstone ships an update every 6 days, and Time Capsule every 3 days. Most recently, Keepstone was updated on October 9, 2026 and Time Capsule on October 6, 2026.

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