Comparison

Secret Diary with Locks vs AI PDF Reader

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

Head to head
About

Secret Diary with Locks

Securely record your thoughts and memories in a private digital journal. Protect your entries with a PIN or biometric unlock. This app stores your data locally, ensuring privacy and offline access.

Highlights
  • Create, edit, and delete diary entries
  • Unlimited entries stored locally
  • 6-digit PIN lock
  • Face ID/Touch ID unlock
  • Search by title or notes
  • Export and import diary
  • Daily reminder
Features
Read full description

Secret Diary with Lock – Your Private Journal Keep your thoughts, memories, and personal moments in a journal that stays on your device. Write private entries and lock them with a 6-digit PIN. On a device that supports it, you can also unlock with Face ID, Touch ID, or the device passcode. Your diary text is stored locally. There is no account, and the app does not upload your entries to a developer server. A forgotten PIN cannot be recovered. You can write with no internet connection. The app does use the network for ads, analytics, crash reports, and subscription verification. Write about your day, your plans, and the moments you want to remember. Features - Create, edit, and delete diary entries - Unlimited entries, stored on your device - Lock with a 6-digit PIN - Unlock with Face ID, Touch ID, or the device passcode when you turn that on - Search by title or notes - Export your diary to a file you choose, and import it back - Optional daily reminder - The diary locks again when you leave the app - Remove ads with the annual subscription Perfect for - Daily journal entries - Personal memories - Private notes - A digital diary instead of a paper notebook Entries stay on the device while the app is installed. Use Export Diary if you want your own copy. Deleting the app can remove entries that were not exported. Subscription Terms - Title of auto-renewing subscription: Premium Ad-Free - Annual - Length of subscription: 1 year - Price: $0.99 per year. The price can vary by country. - Premium Ad-Free - Annual removes ads. Writing, editing, deleting, search, export, and the lock stay available without the subscription. - Payment is charged to your Apple ID when you confirm the purchase. - The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. - Your account is charged for renewal within 24 hours before the current period ends. - Manage the subscription or turn off auto-renewal in Settings > Apple ID > Subscriptions. The current period continues until it ends. - If a free trial is offered, any unused part of that trial is forfeited when you purchase the subscription. Contact Questions: contactusiosapp@gmail.com Privacy Policy: https://github.com/SmartiOSDev/Diary-Secret-Note-With-Lock/blob/main/PrivacyPolicy.md Terms of Use: https://github.com/SmartiOSDev/Diary-Secret-Note-With-Lock/blob/main/TermsOfUse.md

About

AI PDF Reader

Easily scan, convert, and organize documents with your phone's camera. Turn images into PDFs, view multiple file formats, and categorize your files automatically. Designed for students, professionals, and home users to improve work efficiency and simplify daily tasks.

Highlights
  • Scan documents to PDF
  • Convert images to PDF
  • View multi-format files
  • Organized file categorization
  • File favorites
  • History tracking
Features
Read full description

AI PDF Reader - Scan Document is a versatile document management application that helps you easily scan, convert, and organize files. Whether you need to scan paper documents into PDFs or convert image files into high-quality PDFs, all features are just one tap away. Designed to improve work efficiency and document management, it simplifies your daily tasks. Key Features: Scan Documents to PDF: Use your phone's camera to scan documents and quickly generate high-resolution PDFs. Organize files anytime, anywhere. Convert Images to PDF: Turn photos or images into PDF files for easy storage and sharing. Multi-Format File Viewer: View PDF, PPT, Word, and Excel files effortlessly, making it simple to manage diverse document formats. Organized File Categorization: Automatically sort files by type, enabling quick access and improved work efficiency. File Favorites: Mark important files for instant access, ensuring essential documents are never lost. History Tracking: Review file operation history to easily find or manage operated files. Why Choose Us? Efficient and Intuitive: A user-friendly interface to quickly convert files and boost productivity. Comprehensive Compatibility: Supports scanning and conversion of images, PPTs, and Excel files to PDF, meeting all your document needs. Secure and Private: Ensures your files are safe and protects your personal data. Access Anytime, Anywhere: View and manage your documents seamlessly, no matter where you are. Who Is It For? Students: Easily scan textbooks, notes, and assignments, converting them to PDF format for better organization and sharing. Categorization features help students efficiently manage study materials. Professionals: Quickly organize work documents and project files. The Favorites and History features ensure files are always accessible, supporting remote and on-the-go work. Travel Enthusiasts: Convert travel photos, menus, and tickets into PDFs to create travel guides for easy storage and sharing. Back up important travel documents like passports and tickets to ensure they’re always secure. Home Users: Manage household bills, travel documents, and other personal files effortlessly. Quickly scan and convert them to PDFs to streamline your daily file organization. Whether you’re at home, in the office, or traveling, AI PDF Reader - Scan Document is your reliable assistant for efficient document management. Download now and start simplifying file handling while enhancing productivity! AI PDF Reader provides exclusive membership subscription function, and the specific subscription content is subject to in app display. Subscription Notice:https://ai-pdf-editor.com/subscription Privacy Policy: https://ai-pdf-editor.com/privacy Service agreement: https://ai-pdf-editor.com/terms Contact: fastproxyfb223@outlook.com

Screenshots

Secret Diary with Locks4 screens
AI PDF Reader4 screens

Verdict

The call

The clearest difference is ads: Secret Diary with Locks at none against AI PDF Reader's shown. AI PDF Reader's advantage is update cadence (daily vs every 3 months) and iOS requirement (14.0 vs 16.0). On price, in-app purchases, monetization model 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. Secret Diary with Locks sells 1 in-app purchase, starting at $0.99 per year and AI PDF Reader sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Secret Diary with Locks ships an update every 3 months, AI PDF Reader daily. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Secret Diary with Locks versus AI PDF Reader: the parameters behind the verdict, then further details
ParameterSecret Diary with LocksAI PDF Reader
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings—2 — better
Update frequencyEvery 3 monthsDaily — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.014.0 — better
Further details — not scored
Size10 MB33 MB
Age rating4+4+
DeveloperHarshad JadavShenzhen Yicheng Information Technology Co., Ltd

Customer experience

Secret Diary with Locks

Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

AI PDF Reader

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Secret Diary with Locks

Subscriptions1
  • Premium Ad-Free - Annual$0.991 Year
2 purchases

AI PDF Reader

Subscriptions2
  • Weekly Membership$9.997 Days
  • Yearly Membership$39.991 Year

Questions

Is Secret Diary with Locks free?
Secret Diary with Locks is free to download, with in-app purchases available.
Is AI PDF Reader free?
AI PDF Reader is free to download, with in-app purchases available.
Do Secret Diary with Locks or AI PDF Reader have ads?
AI PDF Reader shows ads; Secret Diary with Locks does not.
Which is updated more often, Secret Diary with Locks or AI PDF Reader?
Secret Diary with Locks ships an update every 3 months, and AI PDF Reader daily. Most recently, Secret Diary with Locks was updated on November 7, 2026 and AI PDF Reader on October 30, 2026.

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