Comparison

Check Calendar vs PaperUno

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

Head to head
About

Check Calendar

Easily track your daily habits by marking them on a calendar. Add notes, customize with emojis, and view progress reports. Offers features like reminders, data backup, and biometric security for a private and convenient experience.

Highlights
  • One-tap calendar checks
  • Add notes to entries
  • Unlimited habit categories
  • Customizable emojis
  • Progress reports and graphs
  • Daily reminders
  • Biometric authentication
Features
Read full description

Check Calendar is an app that lets you track your habits by marking them off on a calendar. It's packed with features like one-tap check-offs, notes, unlimited tabs, emojis, reports, notifications, backup & restore, widgets, dark mode, and more. ■ Check off on the calendar Track your habits by checking them off on the calendar with a single tap. ■ Notes Supports both short and long notes! Write freely to keep your records. ■ Unlimited tabs Create unlimited categories like "Workout," "Study," and "Reading." ■ Emojis Change your checkmark to any emoji you like. ■ Checkmark color Change your checkmark to any color you like. ■ Reports Visualize your habit progress with graphs. You can freely change the time range, such as "Last 7 days," "Last 28 days," or "Last 6 months." ■ History View your check-off history, a list of past notes, and more. ■ Notifications Send notifications at any time with any message you choose. Use them so you never forget your habits. ■ Backup / Restore Automatically back up and restore your data. You can transfer your data even across different devices. ■ Widget Check off on the calendar and view your totals right from the widget, without opening the app. You can also use the report widget to quickly check your cumulative, this month, and last month check-off counts. ■ Dark mode Choose your theme from "Light mode," "Dark mode," or "Switch automatically based on device settings." ■ Color theme Change the background color to any color you like. ■ Archive Hide calendars you don't want to see by archiving them. ■ Biometric authentication Supports Face ID and Touch ID. Keep your important records safe and secure. ■ CSV export Export an individual calendar or all of your data in CSV format. ■ Check count Freely set how many times you can check off per day. ■ Security Your data is stored only on your device. It is never sent to third parties. ■ No login required Start using the app right away without signing in. ■ Offline support Works even without an internet connection. ■ Privacy Policy https://checkcalendar.app/privacy-policy ■ Contact If you have any requests or questions, please feel free to reach out through the in-app contact form or via the email address below. info@checkcalendar.app

About

PaperUno

Features
Read full description

PaperUno creates and prints fully customizable graph, lined, handwriting, and planner papers. Easily export pixel-perfect PDFs for home, school, or journaling. Say goodbye to generic notebooks—now you can design, personalize, and print high-quality paper templates tailored precisely to your everyday learning, working, and creative workflow. Key Features • Expanded Template Library: Access a wide range of paper types, including multiple lined/ruled layouts, primary handwriting lines, primary story paper (draw & write), graph, dotted, isometric, sheet music, practice grids, and functional trackers. • Pixel-Perfect Customization: Fine-tune line spacing, grid density, stroke weight, and margin offsets with absolute mathematical precision. • HD Export & AirPrint: One-click vector PDF export for digital note-taking apps (GoodNotes, Notability) or direct A4/Letter printing via AirPrint. • Pro Features & Subscriptions: Unlock full access to our growing collection of premium templates and advanced layout controls with simple, flexible subscription options. Zero Ads. No user tracking. Premium tools, pure focus. -------------------- Terms of Use (EULA): https://bucuode.cn/whitehole/onepaper/terms_of_service_en.html Privacy Notice: https://bucuode.cn/whitehole/onepaper/privacy_notice_en.html

Screenshots

Check Calendar4 screens
PaperUno4 screens

Verdict

The call

The clearest difference is in-app purchases: PaperUno at none against Check Calendar's 1. Check Calendar's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads, 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

Both are free to download. Check Calendar sells 1 one-off in-app purchase. PaperUno asks for nothing beyond the download.

UpkeepUpdate frequency

Check Calendar ships an update every 2 days, PaperUno every 2 weeks. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Check Calendar versus PaperUno: the parameters behind the verdict, then further details
ParameterCheck CalendarPaperUno
PriceFreeFree
Rating4.7 (1.5K ratings) — better—
Positive reviews51.9% of reviews—
Number of ratings1.5K — better—
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.1 — better15.6
Further details — not scored
Size58 MB71 MB
Age rating4+4+
Developernaoki otsu炯炯 胡

Bugs and requests

Check Calendar

Reported bugs

3 issues
  • Inconsistent date tracking
  • Syncing issues between devices
  • Unexpected loss of data and progress

Requested features

4 requests
  • Add widget support
  • Implement reminder/notification system
  • Provide more data visualization and analytics
  • Allow selective clearing of check marks

PaperUno

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Check Calendar

One-time1
  • Premium (Pay Once)$4.99
None

PaperUno

No in-app purchases

Questions

Is Check Calendar free?
Check Calendar is free to download, with in-app purchases available.
Is PaperUno free?
PaperUno is free to download, with no in-app purchases.
Do Check Calendar or PaperUno have ads?
Neither Check Calendar nor PaperUno shows ads.
Which is updated more often, Check Calendar or PaperUno?
Check Calendar ships an update every 2 days, and PaperUno every 2 weeks. Most recently, Check Calendar was updated on September 24, 2026 and PaperUno on September 18, 2026.

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