Comparison

Calndars vs Document Viewer

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

Head to head
About

Calndars

Effortlessly convert dates between over 30 major calendar systems, including Gregorian, Islamic, and Chinese. This utility is designed for global professionals and researchers needing precise cross-cultural date translations. Integrates with widgets and Shortcuts for seamless workflow.

Highlights
  • Convert dates across 30+ calendar systems
  • Supports Gregorian, Islamic, Chinese, Hebrew, Persian, and more
  • Native experience on iPhone, iPad, Mac, Apple Watch
  • Customizable widgets
  • Shortcuts integration
  • AppleScript support on macOS
Read full description

Convert dates across cultures with precision and speed. Calndars is a powerful yet minimal calendar converter designed for global professionals, researchers, and anyone working across time systems. Instantly translate dates between major calendar systems including Gregorian, Hebrew, Islamic, Chinese, Persian, and more. Whether you're coordinating international projects or exploring historical timelines, Calndars delivers accurate results in seconds. Built with modern Apple technologies, the app offers a fast, native experience across iPhone, iPad, Mac, and Apple Watch. Customize your workflow with widgets, favorites, and seamless Shortcuts integration. Designed for efficiency and clarity, Calndars supports over 30 languages and integrates smoothly into your daily tools—without collecting any personal data. A focused utility for a global world. FEATURES - Calndars is the best app to converts dates between the most used calendars in the world. - Select a calendar to set a date, and get the corresponding date in another calendar. - Copy the date to use it in another app. - Add a calendar to the favourites by tapping the star. - Add a calendar to the widgets by tapping the 4 squares icon. - Calendars can be reordered in the list. INTEGRATION - The app supports small, medium and large widgets. - Create a Shortcut in the Apple's Shortcuts App and use the Shortcut everywhere. - Use AppleScript on MacOS for integration between Calndars and other Apps. CALENDARS Calendars to convert between are: - Buddhist - Chinese - Coptic - Ethiopic (Amete Alem) - Ethiopic (Amete Mihret) - Gregorian - Hebrew - indian - Islamic Civil - Islamic Tabular - Islamic Umm Al Qura - Japanese - Persian - Taiwanese - Bangla - Gujarati - Kannada - Malayalam - Marathi - Odia - Tamil - Telugu - Vikram - Dangi - Vietnamese PLATFORM OR DEVICES - iPhone - iPad - Mac - AppleWatch.

About

Document Viewer

Features
Read full description

Palmory is a mobile viewer for Markdown notes, HTML artifacts, PDFs, and related files hosted in GitHub repositories. It is built for browsing knowledge vaults, design docs, research notes, and AI-generated HTML reports on mobile. Use Palmory to open a repository, browse folders, read Markdown, view safe HTML artifacts, search your indexed content, and return to recently opened notes. Palmory stores your GitHub token in local secure storage on your device and keeps repository indexes and cached content local to the app. The current release focuses on viewing and search. It does not edit repository files, commit changes, push branches, resolve merge conflicts, or run a backend operated by GAVRRI. It also does not include ads, tracking, or paid features. Palmory is an independent app and is not affiliated with GitHub, Inc.

Screenshots

Calndars4 screens
Document Viewer4 screens

Verdict

The call

The clearest difference is price: Document Viewer at Free against Calndars's $3.99. Document Viewer also leads on update cadence (every 2 weeks vs every 5 weeks) and iOS requirement (16.4 vs 26.0). On ads, 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

Document Viewer is free to download; Calndars costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calndars ships an update every 5 weeks, Document Viewer every 2 weeks. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

Scorecard3 real differences · 6 level
Calndars versus Document Viewer: the parameters behind the verdict, then further details
ParameterCalndarsDocument Viewer
Price$3.99Free — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS26.016.4 — better
Further details — not scored
Size6 MB171 MB
Age rating4+4+
DeveloperGeert JadoulGAVRRI

In-app purchases

None

Calndars

No in-app purchases

None

Document Viewer

No in-app purchases

Questions

Is Calndars free?
Calndars costs $3.99, with no in-app purchases.
Is Document Viewer free?
Document Viewer is free to download, with no in-app purchases.
Do Calndars or Document Viewer have ads?
Neither Calndars nor Document Viewer shows ads.
Which is updated more often, Calndars or Document Viewer?
Calndars ships an update every 5 weeks, and Document Viewer every 2 weeks. Most recently, Calndars was updated on September 18, 2026 and Document Viewer on September 9, 2026.

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