pdf vs Countdown Keeper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Manage and annotate PDF files on your iPad with fast page turning and intuitive finger-writing. Easily import, organize, and share your notes with friends. Offers a seamless reading and editing experience.
- Fast page turning and content scanning
- Intuitive finger-writing with zoom-in
- Easy PDF import via Dropbox, Email, or iTunes
- Organized bookshelves with search
- Variety of pens, highlighters, and text notes
- Export annotated PDFs via email
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Utilize pdf-notes to manage all the pdf files on your iPad. Fast display, quick page-turning even a thousand pages, useful finger-writing and email your notes to your friends. Differentiation-1. While turning pages of paperbooks fast, you can glance over the pages. While turning pages of pdf-notes fast, you can still run over the contents. Speedy page turning and scanning the contents with pdf-notes or paperbooks. Differentiation-2. There are many pdf readers allow you to annotate; but do you know which app allows you can write any notes in a second? If you are using pdf-notes, you may experience very fast and intuitive finger-writing like: zoom-in and note by double-tap or; writing with one finger, page-turning with two fingers, pen-changing with three fingers. - Easy importing PDF files through (DropBox, Email or Safari's) "Open In..." or iTunes - Categorized multiple bookshelves(booklists) with powerful search - Displaying pages as optimized size 1024x768 of iPad - Portrait and landscape view - Pinch zoom and crop page-margins - Fast loading and Speedy page-turning - Finger-writing with a variety of pens, highlighters and text notes - Easy "zoom-in and note" on a magnified screen by a double tap - One-step page-turning using 2 fingers on editing mode - One-step pen-changing or undo/redo using 3 fingers on editing mode - Exporting annotated PDF files to Email - External display and screen brightness controls - AirPrint and multi-tasking Misunderstandings about pdf-notes: - Not only pdf-notes but every app recently updated is removed from the open-in menu because iOS5 or formers currently show only 10 apps in open-in menu. - iPad/iphone Mail/iBooks can't display PDF annotations so that please open it in the other pdf apps. - please visit the support site for more information http://bit.ly/f6D31P Blog http://pdf-notes.com Email musebook@musebook.com Twitter http://twitter.com/musebook4u YouTube http://youtu.be/4AyRyFq9yxg NOTE: All content contained herein is subject to change without notice.
Countdown Keeper
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Countdown answers one simple question: how long has it been since an important date in your life — or how long until it comes? Save the dates that shaped your story — your date of birth, your first child's birth, your wedding, your graduation, moving into your home, your first day at work — and Countdown tells you exactly how long it has been, in years, months and days, on a live counter that updates every second. For dates still ahead — your retirement, the end of your home loan, a contract's end — it shows exactly how long is left. No sign-up and no clutter: you open the app and see your counters. Every date flips from "how long until" to "how long since" on its own the moment it arrives, so your timeline stays honest without you touching a thing. Countdown speaks both calendars. Count any date in Gregorian or in the Hijri (Umm al-Qura) calendar, and choose the right calendar for each date individually. Have a date in the other calendar? Convert it in the Date converter and save it straight away — no need to switch the app's calendar. • See how long since an important date, or how long until one ahead • Live counters that update every second • Choose exactly which units to show — years, months, days, hours, minutes, seconds • Both calendars: Gregorian and Hijri (Umm al-Qura), per date • Event Story: write the story behind any date and reveal it below its card with a tap • Monthly recurring dates like salary and rent, rolling forward automatically • Reminders before a date — at the time, a day before, or a week before • Repeat a reminder after 5 or 10 minutes, with "Remind again" from the reminder history • Give each date an emoji icon or your own photo, and pick a card colour • Several card styles, and pin your most important dates to the home screen • Built-in date tools: Hijri ↔ Gregorian converter, age calculator, date difference, add & subtract days, and a retirement estimator • Encrypted backup of all your data, restored whenever you need • Export and import your dates as a JSON file • Optional app lock with fingerprint or Face ID • 18 languages: English, Arabic, German, French, Japanese, Korean, Spanish, Turkish, Indonesian, Malay, Chinese, Portuguese, Italian, Russian, Dutch, Urdu, Bengali and Hindi — with full right-to-left support for Arabic and Urdu Countdown is more than a reminder app. It is a calm, living timeline of the dates that shaped your story — and the ones still ahead. Instead of counting the years in your head or digging through old papers, keep every important date in one simple place and always know, at a glance, how long it has been and how long is left. Start free and add up to 5 events. When you need more, you can purchase the full version to add more events and use Countdown beyond the free event limit. Countdown needs no account, works fully offline, and your data stays on your device.
Screenshots
Verdict
The clearest difference is price: Countdown Keeper at Free against pdf's $9.99. Countdown Keeper also leads on update cadence (weekly vs every 2 weeks) and device support (3 vs 1). pdf's advantage is in-app purchases (none vs 1). On ads 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
Countdown Keeper is free to download; pdf costs $9.99 up front. Countdown Keeper sells 1 one-off in-app purchase. pdf asks for nothing beyond the download.
pdf ships an update every 2 weeks, Countdown Keeper weekly. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.
| Parameter | Countdown Keeper | |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.4 (27 ratings) — better | — |
| Positive reviews | 71.5% of reviews | — |
| Number of ratings | 27 — better | — |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 138 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | AMuseTec Co., Ltd. | Abdul Almm |
In-app purchases
No in-app purchases
Countdown Keeper
- Lifetime Access$0.99









