Best Deep Sky Diary Apps

249+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated November 2026

Whether you're new to deep sky diary or looking for an upgrade, our curated collection of 249+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Deep Sky Diary Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Deep Sky DiaryDeep Sky DiaryFree5.0★ (2)NoNoNov 2026
2Secret Diary With PasscodeSecret Diary With PasscodeFree4.6★ (8.2K)YesNoNov 2026
3Simple Diary, Journal, NotesSimple Diary, Journal, NotesFree4.8★ (191)YesNoNov 2026
4Diary - Journal with passwordDiary - Journal with passwordFree4.5★ (1.7K)YesNoNov 2026
5Personal Diary (Journal) AppPersonal Diary (Journal) AppFree4.4★ (106)NoYesOct 2026
6ATLAS Tonight's SkyATLAS Tonight's SkyFree4.3★ (4)NoYesOct 2026
7Diary Journal - With LockDiary Journal - With LockFree4.7★ (368)NoYesOct 2026
8My diary - Secret JournalMy diary - Secret JournalFree4.2★ (10)YesNoOct 2026

Top Picks for Deep Sky Diary

Deep Sky Diary#1

Deep Sky Diary by Shunzhe Ma

Write to future self
Editor's Choice
💪 Health & Fitness
5.0(2 ratings)
Free
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Record your thoughts and memories for your future self or send messages into the void. This app allows you to create regular diary entries, schedule future readings, or send messages that are permanently deleted.

Secret Diary With Passcode#2
4.6😊(8.2K ratings)
FreeAds
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This app provides a secure and user-friendly platform to record your daily life, emotions, and secrets. It offers features like password protection, mood selection, and photo attachments to help you preserve your memories privately.

What We Love

  • 🔒 Password protection
  • 💡 Customizable themes and fonts
  • 👍 Easy to use
  • 🚀 Unlimited entries
  • 🖼️ Ability to add photos
  • 📆 Calendar integration

Room to Improve

  • 🐛 Entries disappearing or not saving properly
  • 📢 Excessive ads
  • 🔒 Password issues (unable to reset, incorrect password not working)
  • 🔍 Lack of search/filter options
  • 📱 Crashes or freezes when using the app
Simple Diary, Journal, Notes#3

Simple Diary, Journal, Notes by Futoshi Niiho

Simple and cool diary app
Worth Considering
🔧 Utilities
4.8😊(191 ratings)
FreeAds
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This app offers a straightforward and aesthetically pleasing way to maintain a daily journal. Designed for users seeking simplicity, it avoids complex settings for an intuitive and stress-free journaling experience.

What We Love

  • 👍 Simple and efficient
  • 📝 Convenient for quick note-taking
  • 🗓️ Automatic date tracking
  • 📷 Ability to attach photos
  • 🔒 Password protection
  • 🧠 Helpful for ADHD users
  • 💻 Clean and minimalistic design

Room to Improve

  • 🔤 Unable to adjust font size
  • 🐛 Occasional data loss or disappearing entries
  • 🖼️ Photo attachment process can be cumbersome

More Deep Sky Diary apps to explore

FAQ about Deep Sky Diary

What are the best deep sky diary apps for iPhone?
Deep Sky Diary tops our deep sky diary apps ranking as of November 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Yes — 20 of the top deep sky diary apps we rank are free to download, including Deep Sky Diary and Secret Diary With Passcode.
Deep Sky Diary has no ads and has no in-app purchases, according to its App Store listing as of November 2026.
We track 249+ deep sky diary apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.