Comparison

single line diary vs Secret Diary

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

Head to head
About

single line diary

A simple daily journal app that allows you to record entries from 62 days in the past up to tomorrow. It features a checkbox for each day and lets you customize the start of your week to Sunday or Monday.

Highlights
  • Daily single line entries
  • Checkbox for each day
  • Customizable week start (Sunday/Monday)
  • Date range: 62 days prior to tomorrow
Read full description

from 62 days before to tomorrow, 64 days daily single line diary with a checkbox. switching the first day of the week in Sunday or Monday.

About

Secret Diary

A secure, offline digital journal that prioritizes your privacy. Store thoughts locally with robust encryption and multimedia support. Export entries as PDFs for complete data ownership.

Highlights
  • True offline functionality
  • Local encryption with Face ID/Touch ID
  • Multimedia entries with multiple images
  • Calendar heatmap for recording frequency
  • Gentle, customizable writing reminders
  • One-click encrypted PDF export
Read full description

[Why Choose Us] Your private thoughts should never be stored on someone else's servers. In an era of frequent data breaches, we built a diary App that goes against the trend: • True Offline: No network permissions required. We do not request access to your location, contacts, or photos. Even the developers cannot access your words. • True Local Encryption: Supports Face ID, Touch ID, and password triple lock screen. Encryption protection helps reduce privacy risks if your phone is lost. • True Data Ownership: All diaries are stored only on your device. Support one-click export of encrypted PDFs, giving you full control over device switching and backups. [More Than Safe, A Recording Partner That Understands You] • Immersive Timeline: Say goodbye to cluttered lists and review your past like flipping through a life album. • Multimedia Diary: Each entry supports multiple images, giving your memories visuals and context. • Calendar Heatmap: See your recording frequency at a glance and fight forgetfulness with persistence. • Gentle Reminders: Customize your writing time. No interruptions, no pressure, only appearing when you need it. [Our Firmest Privacy Commitment] • Zero Network Requests: Verifiable anytime in settings. Absolutely no background uploads. • Zero Third-Party SDKs: No ad tracking, no data analytics, no social logins. • Your Data Belongs to You Forever: Even if the App is removed from the store, exported PDFs remain readable permanently. • Important Notice: Due to pure local storage, uninstalling the App will erase all data. Please regularly use the Export PDF feature to back up precious memories. Your data should be managed by you alone. [To You, Seeking a Place of Peace] We do not chase user numbers. We only wish to be a trusted sanctuary for the few. If you are tired of cloud sync anxiety, pop-up ads, and lengthy privacy policies, welcome back to this quiet corner that belongs only to you. For any suggestions or questions, please contact us via the email below. We read every single piece of feedback carefully: mailto:yctou2026@163.com

Screenshots

single line diary1 screens
Secret Diary4 screens

Verdict

The call

The clearest difference is review sentiment: Secret Diary at 100% against single line diary's 45%. Secret Diary also leads on ads (none vs shown) and update cadence (monthly vs every 6 months). single line diary's advantage is price (Free vs $0.99) and iOS requirement (6.0 vs 15.6). On in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

single line diary is free to download; Secret Diary costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

single line diary ships an update every 6 months, Secret Diary monthly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard6 real differences Ā· 2 level
single line diary versus Secret Diary: the parameters behind the verdict, then further details
Parametersingle line diarySecret Diary
PriceFree — better$0.99
Positive reviews45.5% of reviews100.0% of reviews — better
Update frequencyEvery 6 monthsMonthly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
DevicesiPhone, iPodiPhone, iPod
Requires iOS6.0 — better15.6
Further details — not scored
Size4 MB8 MB
Age rating4+9+
DeveloperSHIGETO TAKAGI景 刘

Customer experience

single line diary

Written reviews11 reviews
Positive45.5%
Neutral9.1%
Negative45.5%

Secret Diary

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

single line diary

No in-app purchases

None

Secret Diary

No in-app purchases

Questions

Is single line diary free?
single line diary is free to download, with no in-app purchases.
Is Secret Diary free?
Secret Diary costs $0.99, with no in-app purchases.
Do single line diary or Secret Diary have ads?
single line diary shows ads; Secret Diary does not.
Which is updated more often, single line diary or Secret Diary?
single line diary ships an update every 6 months, and Secret Diary monthly. Most recently, single line diary was updated on November 1, 2026 and Secret Diary on October 31, 2026.

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