Comparison

Sleek Calendar vs PDF Reader

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

Head to head
About

Sleek Calendar

This app offers a clean and intuitive calendar and planner experience. Easily manage personal events with colorful icons, drag-and-drop rescheduling, and automatic event creation from photos. It also includes step tracking and event sharing capabilities.

Highlights
  • Automatic event creation from photos
  • Daily step goal tracking
  • Drag and drop event rescheduling and cloning
  • Colorful event icons
  • Event sharing with other users
  • Widgets and Apple Watch support
Features
Read full description

Welcome to the simplest, the cleanest and the clearest calendar & planner app! Sleek Calendar is your new personal agenda with colorful icons for your events, a clean interface, easy to use features to manage and share your personal events and memories, the ability to drag and drop to change an event’s date or to clone it, and much more to make you fall in love with this app! What's new in ver. 3.0? 1. Create events from photos: Snap or upload a photo of an appointment slip, festival poster, or any document with a date and let the app instantly recognize the details to create your event automatically. 2. Track your daily steps: Set your daily step goal and watch your progress come to life on your calendar with beautiful, color-coded highlights that show how well you’re staying on track. Enjoy Sleek Calendar's cool features: 1. Improved events registration user interface. 2. Auto-icons feature to save your time finding a suitable icon for your event! 3. Now, the event's drag & drop feature supports cloning the event on any date! 4. Quick-Events feature to add a repetitive event quickly on any date by simply clicking the event’s icon! 5. Attach photos and add notes to your memories and appointments. 6. Find the duration between similar events through filtering by the event’s icon! 7. Mark your favorite events or memories. 8. Widgets and Apple Watch support to keep you up to date on your upcoming appointments. This is how Sleek Calendar is different: 1. Know your entire month’s events at a glance without tapping on each date! 2. Icons make your events come to life! It’s never been this easy and fun to SEE your events. 3. Drag & Drop to change any event’s date or to clone it on another day, takes only 1 second! 4. Filter your events by icons and know the duration between them. 5. Easily share your events by adding another user, wait for the approval, then tap his/her name as you add an event. Sharing events has never been this easy. More of Sleek Calendar’s cool features: 1. Drag & Drop: Simply let the event’s icon go outside the calendar if you don’t want to reschedule it. If you already did, then changed your mind, shake your iPhone and it will set back to its original date. 2. Special Icon Set for Ladies: We kept it optional as we don’t think that gentlemen will ever need to schedule a nail polishing appointment! 3. Countdown: Tap on an upcoming event to get a countdown until the final date. Tap on any past event to know how many days have already been passed since the event took place.  4. Auto Daily Notifications: Set your preferred time to get a daily notification of your today’s and tomorrow’s events. 5. Events List: Your entire year’s events, appointments and memories will be in front of you! Search your events by text or icons, filter them by shared events, quick events or your favorite ones. Other main features: 1. Widgets: Three different types with customizable background colors to personalize according to your liking. 2. Apple Watch support: Complications will help you to know your upcoming event with a countdown. 3. Cloud backup: Sign up and keep your events and memories safe for life. Retrieve your backup anytime on any supported device. Sleek Calendar is a free to use app with subscription options for extra features. You may purchase an annual subscription for $19.99 or a monthly subscription for $1.99 through an In-App Purchase. Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. Current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. Terms of use: https://sleekcal.com/SleekCalendar_TOS.html Privacy policy: https://sleekcal.com/SleekCalendar_Privacy.html

About

PDF Reader

This app is a fast and lightweight document viewer for PDF, Word, Excel, and PowerPoint files. It offers smart file management, offline access, and easy sharing, making it ideal for students and professionals. Enjoy a seamless reading experience with features like search, bookmarks, and dark mode.

Highlights
  • All-in-one document viewer (PDF, DOCX, XLSX, PPTX, TXT)
  • Smart file manager
  • Offline document access
  • Fast and smooth performance
  • Search and bookmarking
  • Dark mode support
  • Easy document sharing
Features
Read full description

PDF Reader - Smart Reader is a fast, lightweight, and powerful document viewer that allows you to read PDF, Word, Excel, and PowerPoint files all in one place. Designed for efficiency, it helps you manage and view your documents seamlessly without needing an internet connection. Key Features: All-in-One Viewer: Open and read PDF, DOCX, XLSX, PPTX, and TXT files instantly. Smart File Manager: Automatically scans and organizes all documents stored on your device. Fast & Smooth: Optimized for large files, ensuring quick page loading and smooth scrolling. Privacy Focused: Your documents remain on your device. We process everything locally and never upload your files to any server. Search & Bookmark: Easily find your documents with a powerful search tool and save important pages for later. Dark Mode Support: Comfortable reading experience in any lighting condition. Share Easily: Share your documents via email or social media with just one tap. Whether you are a student or a professional, PDF Reader - Smart Reader is the perfect tool for your daily document needs. Download now and simplify your digital life!

Screenshots

Sleek Calendar4 screens
PDF Reader4 screens

Verdict

The call

The clearest difference is rating: Sleek Calendar at 4.5 against PDF Reader's 4.0. Sleek Calendar also leads on review sentiment (83% vs 50%) and ratings volume (45 vs 4). PDF Reader's advantage is update cadence (every 4 days vs every 3 weeks) and monetization model (ad-supported vs free with in-app purchases). On price, ads, in-app purchases and iOS requirement 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. Sleek Calendar sells 2 in-app purchases, starting at $1.99 per month and PDF Reader sells 1 in-app purchase, starting at $19.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleek Calendar holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Sleek Calendar has 45 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 83% of Sleek Calendar's written reviews are positive against 50% of PDF Reader's.

UpkeepUpdate frequency

Sleek Calendar ships an update every 3 weeks, PDF Reader every 4 days. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

Scorecard6 real differences · 4 level
Sleek Calendar versus PDF Reader: the parameters behind the verdict, then further details
ParameterSleek CalendarPDF Reader
PriceFreeFree
Rating4.5 (45 ratings) — better4.0 (4 ratings)
Positive reviews83.3% of reviews — better50.0% of reviews
Number of ratings45 — better4
Update frequencyEvery 3 weeksEvery 4 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS15.6 — better16.4
Further details — not scored
Size78 MB85 MB
Age rating4+4+
DeveloperThaqib Halwanitruong nguyen xuan

Customer experience

Sleek Calendar

All ratings45 ratings
Positive91.1%
Neutral0.0%
Negative8.9%
Written reviews72 reviews
Positive83.3%
Neutral5.6%
Negative11.1%

PDF Reader

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

2 purchases

Sleek Calendar

Subscriptions2
  • Sleek Monthly Subscription$1.991 Month
  • Annual Subscription$19.991 Year
1 purchases

PDF Reader

Subscriptions1
  • Premium Subscription - 1 week$19.997 Days

Questions

Is Sleek Calendar free?
Sleek Calendar is free to download, with in-app purchases available.
Is PDF Reader free?
PDF Reader is free to download, with in-app purchases available.
Which has better reviews, Sleek Calendar or PDF Reader?
Sleek Calendar is rated higher. Sleek Calendar averages 4.5 out of 5 from 45 ratings, while PDF Reader averages 4.0 from 4 ratings.
Do Sleek Calendar or PDF Reader have ads?
Both Sleek Calendar and PDF Reader show ads.
Which is updated more often, Sleek Calendar or PDF Reader?
Sleek Calendar ships an update every 3 weeks, and PDF Reader every 4 days. Most recently, Sleek Calendar was updated on October 5, 2026 and PDF Reader on October 6, 2026.

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