Comparison

OnefuncPlan vs Calcifon

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

Head to head
About

OnefuncPlan

This app helps you gain insights into your daily actions and routines. It offers task management, workload tracking, and stress monitoring, with AI-powered analysis based on Volitional Motion Theory. Share schedules with others and access your data across multiple devices.

Highlights
  • Quick task and idea capture
  • Schedule and task management tools
  • AI-powered workload and stress monitoring
  • Shared schedules with commenting
  • Cross-device data synchronization
  • Optional location for weather
Features
Read full description

OnefuncPlan turns your daily actions into clear, usable insights. You can start using the app instantly—no email required. All calculations and AI processing are performed locally on your device. Key Features Quick Entry Capture tasks and ideas instantly, without breaking your flow. Essential Tools All the core features you need for schedule and task management. AI Support Powered by Volitional Motion Theory (VMT), the app monitors your daily tasks, keeps track of your workload and stress, and helps you notice small changes in your routine. Shared Schedules Share plans with family or colleagues and exchange comments seamlessly. Also available on macOS, Windows, and the web. Data syncs automatically across all your devices. Notes on Permissions This app temporarily uses location to provide weather information. Location is only used to provide weather info and is optional. By default, your general area is determined from your IP address. The app may optionally add birthdays from your contacts. No other contact information is accessed. Paid Features The app offers two subscription plans that unlock additional features and greater convenience. Basic Plan: 1. Full-text search for past events 2. Unlimited number of undated event notes and favorite events 3. Ability to reorder the main menu 4. Remove restrictions on automatic event color settings 5. Unlimited creation of shared spaces (previously limited to 2) 6. Increase the maximum characters for monthly notes from 3,000 to 6,000 7. Ability to copy Masterpiece data 8. Edit event menus (iOS only) 9. Add detailed options for activity measurement methods 10. Full access to "Structure Tags" in Analysis 11. Show "wits" (Will Momentum) on the Main screen Basic Plan is an auto-renewing subscription. Premium Plan: 1. All Basic features available. 2. Scheduled coordination: Member limit increased from 3 to 33 3. Shared Spaces: Max members increased from 2 to 33 4. Shared Spaces: Max follows increased from 2 to 20 4. Status Screen: Simultaneous user display increased from 3 to 20 5. Extended comment retention for shared events (up to 1 year) 6. Masterpiece: Max task image attachments increased from 1 to 3 Premium Plan is an auto-renewing subscription. Subscription Information Paid plans are auto-renewing subscriptions (monthly or yearly). Payment will be charged to your iTunes account. You can manage auto-renewal in your iTunes account settings and turn it off after purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. According to the iTunes Store’s In-App Subscription Terms and Onefunc’s Terms of Service, paid subscriptions are non-refundable, except where required by law. If you purchase a subscription during a free trial, any unused portion of the free trial will be forfeited. Privacy Policy: https://onefunc.com/privacypolicy/ Terms of Service: https://onefunc.com/termsofservice/

About

Calcifon

This multiplatform calendar app offers a simple and intuitive way to manage your schedule. It syncs with iOS and Google Calendars, allowing for easy event rescheduling and organization with color-coding. Premium features unlock additional views and customization options.

Highlights
  • Simple and intuitive interface
  • Drag & drop rescheduling
  • Color-coded events
  • Automatic sync with iOS and Google Calendar
  • Monthly & Daily schedule views (Premium)
  • iPad and Mac app support (Premium)
  • Customizable background image (Premium)
Features
Read full description

Calcifon is a simple and multiplatform schedule management app that stores and syncs events in cooperation with iOS calendars and Google Calendar. ■Calcifon features - Simple and Intuitive Simply slide left or right to switch month on the monthly schedule screen. Select a date and tap again to see a list of events for the day. - Reschedule with Drag & Drop Intuitively change the date of an event by drag & drop on the monthly schedule screen and also on the daily schedule screen. - Colorful Events Coloring events makes them easier to distinguish and helps you keep track of your schedule. - Automatic Sync with iOS and Google Calendar Sync events with iOS calendar and Google calendar, so the events can be synchronized across your Apple devices. - Monthly & Daily Schedule View (Premium) In the iPhone app, you can switch from the monthly schedule screen to the monthly & daily schedule screen. - iPad App (Premium) The schedule can be viewed on an iPad with a large screen. - Weekly Schedule & Monthly Schedule View (Premium) In the Mac app, you can switch from the main screen to the weekly schedule screen or monthly schedule screen. - Setting a Background Image (Premium) You can set a photo as the background of the main screen. - Notification Calcifon do not notify the notifications set for events. Notifications set to iOS calendar will be issued by the Apple’s calendar application, and notifications set to Google Calendar will be issued by Google with some notification methods, so please configure the notification settings on those applications. - Calcifon Premium Calcifon Premium is available with two purchase options: a monthly subscription, or a yearly subscription. As for the subscription options, Calcifon Premium automatically renews as a paid subscription, unless cancelled at least 24 hours before the date of renewal. The payment will be charged to Apple ID Account at confirmation of purchase. Your account will be charged for renewal within 24-hours prior to the end of the current period. You can cancel subscription anytime by turning off auto-renewal through your account settings. This must be done 24 hours before the end of subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the basic service. We value the opinions of our users. We welcome your feedback. - Privacy Policy: https://kaurilab.com/calcifon/privacy-policy - Terms of Use: https://kaurilab.com/calcifon/terms-of-use

Screenshots

OnefuncPlan4 screens
Calcifon4 screens

Verdict

The call

The clearest difference is rating: Calcifon at 5.0 against OnefuncPlan's 4.0. Calcifon also leads on review sentiment (100% vs 67%) and device support (4 vs 2). OnefuncPlan's advantage is update cadence (every 4 days vs every 2 months). On price, ratings volume, ads and in-app purchases 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. OnefuncPlan sells 13 in-app purchases, starting at $2.99 per month and Calcifon sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calcifon holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 67% of OnefuncPlan's written reviews are positive against 100% of Calcifon's.

UpkeepUpdate frequency

OnefuncPlan ships an update every 4 days, Calcifon every 2 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 6 level
OnefuncPlan versus Calcifon: the parameters behind the verdict, then further details
ParameterOnefuncPlanCalcifon
PriceFreeFree
Rating4.0 (3 ratings)5.0 (2 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings3 — better2
Update frequencyEvery 4 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS14.0 — better15.0
Further details — not scored
Size35 MB41 MB
Age rating17+4+
DeveloperMasaru KondoKauriLab Inc.

Customer experience

OnefuncPlan

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews48 reviews
Positive66.7%
Neutral4.2%
Negative29.2%

Calcifon

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

13 purchases

OnefuncPlan

Subscriptions10
  • Basic(1 month)$2.991 Month
  • Pro (1 month)$2.991 Month
  • 3 mons. & special free trial7 Days trial$8.493 Months
Show 7 more
  • Premium (1 month)$9.991 Month
  • Premium (3 months)$13.993 Months
  • Premium (6 months)$25.996 Months
  • Basic(1 year)$29.991 Year
  • Pro (1 year)$29.991 Year
  • Premium (1 year) + α$46.991 Year
  • Premium (1 year)$99.991 Year
One-time3
  • OnetimePremium$0.99
  • Premium service (one month)2 variants$4.99
  • Onefunc Plan Advance$15.99
2 purchases

Calcifon

Subscriptions2
  • Premium (1 month)$1.991 Month
  • Premium (1 year)$19.991 Year

Questions

Is OnefuncPlan free?
OnefuncPlan is free to download, with in-app purchases available.
Is Calcifon free?
Calcifon is free to download, with in-app purchases available.
Which has better reviews, OnefuncPlan or Calcifon?
Calcifon is rated higher. OnefuncPlan averages 4.0 out of 5 from 3 ratings, while Calcifon averages 5.0 from 2 ratings.
Do OnefuncPlan or Calcifon have ads?
Neither OnefuncPlan nor Calcifon shows ads.
Which is updated more often, OnefuncPlan or Calcifon?
OnefuncPlan ships an update every 4 days, and Calcifon every 2 months. Most recently, OnefuncPlan was updated on October 4, 2026 and Calcifon on October 9, 2026.

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