Comparison

Cally Calendar vs PDFOne

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

Head to head
About

Cally Calendar

See your upcoming meetings and their progress directly on your iPhone's Lock Screen. It intelligently switches between work and personal calendars based on your Focus modes and provides quick access to join calls.

Highlights
  • Lock Screen meeting display
  • Focus mode integration
  • Live timeline view
  • Double-booking alerts
  • One-tap call joining
  • On-device data processing
Features
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Cally puts the meeting you're in — and the ones right behind it — on your Lock Screen, so you can tell what's next without opening anything. FOLLOWS YOUR FOCUS Turn on your Work Focus and Cally shows your work calendars. Switch to Personal and it follows. You choose which calendars belong to which Focus once, and iOS does the switching from then on. A LIVE TIMELINE, NOT A LIST The meeting you're in sits at the top with a countdown and a progress bar showing how much of it is left. Underneath, the next events are strung along a timeline, so the shape of your afternoon is obvious at a glance. DOUBLE-BOOKINGS, CALLED OUT Two meetings in the same slot are marked "2 at once" rather than quietly hidden behind each other — so you find out before you're late to one of them. WORKS WITH THE CALENDARS YOU ALREADY HAVE Google, iCloud, Exchange — if the account is in iOS Settings, Cally reads it. There is no sign-in, no account to create, and no setup beyond picking your calendars. ONE TAP INTO THE CALL Meetings with a video link get a Join button right on the Lock Screen. TOLD, NOT JUST SHOWN Cally can buzz when one meeting ends and the next is up, even while it's closed. YOUR CALENDAR STAYS ON YOUR IPHONE Cally reads your events on-device and never sends them anywhere. Cally is free and supported by ads. Requires iOS 17. Live Activities appear on iPhone.

About

PDFOne

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**PDFOne makes working with PDFs simple on iPhone.** Open a document, organize its pages with intuitive gestures, add new content, fill in your PDF, and place your signature — all within a clean interface designed to keep the document at the center of your work. Whether you need to fix a few pages or reorganize a larger document, PDFOne gives you the essential tools without unnecessary complexity. **ORGANIZE YOUR PAGES** View your document as a Grid, Carousel, or List and choose the layout that works best for you. You can: • reorder pages with drag and drop; • select multiple pages; • create and manage page stacks; • duplicate or delete pages; • replace pages while keeping control of your document; • extract and reorganize content when needed. **ADD NEW CONTENT** Insert additional PDFs exactly where you need them, or create new pages from: • PDF documents; • images from your Photos library; • blank pages. **FILL IN PDFs** Add text directly to a PDF page, position it where it belongs, and adjust its size before applying it to the document. Perfect for forms, administrative documents, and PDFs that need additional information. **ADD YOUR SIGNATURE** Import a signature and keep it in your signature library so it is ready whenever you need it. Add multiple signatures, move them around the page, resize them, or remove them before applying your changes to the PDF. **SAVE AND SHARE** Save your changes, create a separate copy, or share the finished PDF using the familiar sharing tools built into iOS and iPadOS. **DESIGNED TO STAY SIMPLE** PDFOne is built as a native Apple app, with familiar controls, direct interactions, light and dark appearances, and an interface that keeps the focus on your document. No unnecessarily complicated tools. Just what you need to organize, fill, sign, and manage your PDFs.

Screenshots

Cally Calendar4 screens
PDFOne4 screens

Verdict

The call

The clearest difference is price: Cally Calendar at Free against PDFOne's $2.99. Cally Calendar also leads on update cadence (every 2 days vs every 4 days). PDFOne's advantage is ads (none vs shown). On in-app purchases, device support 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

Cally Calendar is free to download; PDFOne costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cally Calendar ships an update every 2 days, PDFOne every 4 days. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 6 level
Cally Calendar versus PDFOne: the parameters behind the verdict, then further details
ParameterCally CalendarPDFOne
PriceFree — better$2.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 days — betterEvery 4 days
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhoneiPhone, iPad — better
Requires iOS18.017.0 — better
Further details — not scored
Size5 MB9 MB
Age rating4+4+
DeveloperChathushka RodrigoANTONIO PADALINO

In-app purchases

None

Cally Calendar

No in-app purchases

None

PDFOne

No in-app purchases

Questions

Is Cally Calendar free?
Cally Calendar is free to download, with no in-app purchases.
Is PDFOne free?
PDFOne costs $2.99, with no in-app purchases.
Do Cally Calendar or PDFOne have ads?
Cally Calendar shows ads; PDFOne does not.
Which is updated more often, Cally Calendar or PDFOne?
Cally Calendar ships an update every 2 days, and PDFOne every 4 days. Most recently, Cally Calendar was updated on October 20, 2026 and PDFOne on October 18, 2026.

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