Comparison

Diary Lock vs PDF Lite

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

Head to head
About

Diary Lock

Capture your thoughts, plans, and memories securely. This app offers rich text editing, voice notes, mood tracking, and smart reminders to help you organize your life and protect your private information.

Highlights
  • Rich text editor with formatting options
  • Voice note recording
  • PIN-protected individual notes
  • Daily mood tracking
  • Smart reminders and event scheduling
  • Drawing and image insertion
Features
Read full description

Your All-in-One Private Notes & Planner Write, organize, and protect your thoughts with powerful tools in one simple app. Rich Text Editor • Bold, italic, underline & strikethrough • Bullet & numbered lists • Multiple fonts • Highlight & text color options • Add stickers • Insert images • Organize with tags Voice Notes • Record audio directly inside notes • Capture ideas instantly • Perfect for meetings & quick thoughts Private & Secure • Lock individual notes with PIN • Protect personal journals • Keep sensitive information safe Mood Tracking • Set daily moods • Reflect on your emotions • Make journaling more meaningful Smart Reminders & Events • Create events with start & end time • Repeat options • Get notified on time • Stay on schedule More Creative Tools • Draw freely inside notes • Customize with colors • Clean & intuitive design • Organize by date & category Perfect for journaling, planning, studying, goal tracking, and daily organization. Simple. Powerful. Secure. Start with free features and upgrade anytime to unlock the full experience. If you subscribe to a “Pro” plan, payment will be charged to your iTunes account at the time of purchase confirmation. Any unused portion of a free trial (if offered) will be forfeited once you start a subscription. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage your subscription and disable auto-renewal anytime in your Account Settings. Cancellations are not allowed during the active subscription period. For support or questions, please contact us at miraclefifth@gmail.com Privacy Policy - https://secret-diary-journal-lock.blogspot.com/2026/02/privacy-policy.html Terms of Use - https://secret-diary-journal-lock.blogspot.com/2026/02/terms-of-use.html EULA - https://secret-diary-journal-lock.blogspot.com/2026/02/eula.html If you enjoy using Secret Diary: Journal & Lock, please take a moment to rate us and share your feedback.

About

PDF Lite

Features
Read full description

PDF Lite is a complete PDF editor that works offline. No account and no uploads to us: your documents stay on your iPhone or iPad, or in your own iCloud Drive if you turn sync on. Open any PDF straight from Mail, Safari, WhatsApp or Files with "Open in PDF Lite" or the share sheet, then edit, sign, convert and protect it on the device. EDIT • Edit existing text: change words, font, size, bold, italic, colour and alignment • Add text and images, then move, resize or replace them later • Watermarks, headers and footers, Bates numbers, backgrounds, links and bookmarks FILL & SIGN • Fill any form; type text, ticks, dates and initials • Draw or type your signature • Certified digital signatures (PAdES) with your own ID, and signature validation • Design forms: add fields, auto-detect them, set the tab order, export the data CONVERT • Word, Excel, PowerPoint, Pages, Numbers, Keynote, web pages, RTF, text and CSV to PDF, on the device • PDF to Word, Excel, PowerPoint, HTML, RTF, text or images • Turn photos into PDF; compress PDFs for email SCAN & OCR • Scan paper documents with the camera • ID card mode puts the front and back on one page at real size • Receipt mode reads the shop, date and total and names the file for you • Book mode splits two-page spreads; enhanced, grayscale and black-and-white filters • On-device text recognition makes scans searchable and copyable READ • Read Aloud highlights each word as it is spoken • Reading mode reflows text with adjustable size, sepia and night themes • Apple Pencil palette with marker and eraser, double tap and squeeze; tabs on iPad • Summarize a document or ask it questions with Apple Intelligence on supported devices, and translate PDFs with Apple's on-device translation. Nothing is sent to a server. ORGANISE & SYNC • Merge, split, reorder, rotate, extract, crop and delete pages • Optional iCloud Drive folder, in sync on your iPhone, iPad and Mac; both versions kept if a file changes on two devices • Shortcuts and Siri actions, Spotlight search and Home and Lock Screen widgets PROTECT & REVIEW • AES-256 passwords and print, copy and edit restrictions • True redaction that removes text, not just covers it • Highlight, comment, stamps and a comment manager • Compare two versions of a document and see every change • PDF/A conversion and an accessibility checker Reading and opening PDFs, scanning, iCloud Drive sync, Spotlight and widgets are free. Premium tools are available with a yearly subscription or a one-time lifetime purchase. PRIVACY & TERMS Privacy Policy: https://nahitfidanci.com/pdf-lite/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Diary Lock4 screens
PDF Lite4 screens

Verdict

The call

The clearest difference is ads: PDF Lite at none against Diary Lock's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Diary Lock sells 4 in-app purchases, starting at $3.99 per 7 days and PDF Lite sells 4 in-app purchases, starting at $15.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 8 level
Diary Lock versus PDF Lite: the parameters behind the verdict, then further details
ParameterDiary LockPDF Lite
PriceFreeFree
Rating3.8 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 2 weeksEvery 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better16.0
Further details — not scored
Size71 MB46 MB
Age rating4+4+
DeveloperJay LakhaniFerda Nahit Fidanci

In-app purchases

4 purchases

Diary Lock

Subscriptions3
  • Weekly Pro Access$3.997 Days
  • Monthly Pro Access$9.991 Month
  • Yearly Pro Access3 Days trial$19.991 Year
One-time1
  • Lifetime Pro Access$39.99
4 purchases

PDF Lite

Subscriptions2
  • Premium Yearly7 Days trial$15.991 Year
  • PDF Lite Premium1 Year trial$15.991 Year
One-time2
  • PDF Lite Lifetime$23.99
  • PDF Lite Unlock$31.99

Questions

Is Diary Lock free?
Diary Lock is free to download, with in-app purchases available.
Is PDF Lite free?
PDF Lite is free to download, with in-app purchases available.
Do Diary Lock or PDF Lite have ads?
Diary Lock shows ads; PDF Lite does not.
Which is updated more often, Diary Lock or PDF Lite?
Diary Lock ships an update every 2 weeks, and PDF Lite every 2 weeks. Most recently, Diary Lock was updated on October 31, 2026 and PDF Lite on November 5, 2026.

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