Comparison

Calcifon vs DutyCal

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

Head to head
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

About

DutyCal

This app syncs your flight schedule from your crew portal to your iPhone Calendar and provides a printable monthly overview for your family. It offers weather updates, pre-departure alarms, and a pay estimate, all while prioritizing user privacy.

Highlights
  • Roster sync to iPhone Calendar
  • Printable monthly overview sheet
  • Weather updates for flights
  • Pre-departure alarms
  • Monthly pay estimate
  • Logbook data import
  • FAR 117 compliance tracking
Read full description

DutyCal pulls your roster from your crew portal and syncs it to iPhone Calendar. It also prints a clean monthly sheet so your family can see what's happening at a glance. For pilots and cabin crew who fly out at 4 a.m. and want their household to know the month ahead. No chat group. No screenshots. No explaining it again over breakfast. DutyCal Plus subscription required to sync your roster after a 3-day free trial. Cancel anytime. DutyCal currently supports crew at Peach (MM), StarFlyer (7G), and Avelo (XP). Additional airlines on the roadmap. Other portals will not sync. ROSTER, ON YOUR PHONE Log in once with your crew portal credentials. DutyCal fetches your duty schedule, reconciles changes across publishes, and writes every flight, standby, training day, and day off to a dedicated calendar on your iPhone. Flight rows read departure and arrival in each airport's own clock, with the Zulu window right on the row for a quick TAF and NOTAM crossref. Works offline once a roster is loaded. WEATHER ON YOUR FLYING DAYS A METAR line on every leg you fly, with the raw METAR and TAF one tap away, and up to two alternates per leg. THE FRIDGE SHEET A printable A4 landscape view, one row per day, color-coded for flight duty, airport standby, home standby, training, sick, and off. Stick it on the fridge. Your partner stops asking. Designed to be readable at arm's length. ALARMS THAT WAKE YOU Pre-departure alarms set themselves on every flight day and airport standby. They ring through Silent mode and Focus, the way the iOS Clock app does, and stop only when you dismiss them. You choose your at-base lead time. No accidental snooze. A MONTHLY PAY ESTIMATE A running pre-tax estimate of the month so far, built from your duty hours, sectors, and credit. Past months compared against your original published roster. Avelo crews see their paychecks the way they land, on the 7th and the 22nd. No payslip data leaves the phone. THE LOGBOOK, READY TO COPY Peach and StarFlyer flight crew can import their company records and print JCAB pages, fifteen rows each, ready to copy into the paper logbook. The paper book stays the official record. FOR AVELO CREWS FAR 117 at a glance, worked out from the roster on your phone, with a quiet watch that warns you the evening before a tight duty. Station Operations: type any station and read its whole day, departures and arrivals with aircraft, crew, pax, fuel and movement notes, straight from the portal. And a heads-up when your next leg is a different aircraft. PRIVATE BY DESIGN Your login is stored in iOS Keychain, locked to your device. No account creation. No DutyCal servers. No analytics. No third-party trackers. Face ID protects the app on launch. BUILT BILINGUAL Full English and Japanese throughout, including the fridge sheet. Switch languages without restarting. WHAT IT COSTS 3-day free trial on both plans, then DutyCal Plus subscription required to continue. - Monthly: ¥550/month - Yearly: ¥5,000/year Prices are shown in your local currency at checkout. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions auto-renew at the same price unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription anytime in iPhone Settings → Apple ID → Subscriptions. No ads. No data sold. DutyCal is built for crew. Try it free for 3 days and see your next month in one view. Privacy Policy: https://dutycal.app/privacy Terms of Use: https://dutycal.app/terms

Screenshots

Calcifon4 screens
DutyCal4 screens

Verdict

The call

The clearest difference is monetization model: Calcifon at freemium against DutyCal's subscription. DutyCal's advantage is update cadence (every 4 days vs every 2 months). On price, rating, ratings volume and ads 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. Calcifon sells 2 in-app purchases, starting at $2.19 per month and DutyCal sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Calcifon against 5.0 for DutyCal. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Calcifon ships an update every 2 months, DutyCal every 4 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Calcifon versus DutyCal: the parameters behind the verdict, then further details
ParameterCalcifonDutyCal
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size31 MB11 MB
Age rating4+4+
DeveloperKauriLabRushabh Soni

Customer experience

Calcifon

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DutyCal

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Calcifon

Subscriptions2
  • Premium (1 month)$2.191 Month
  • Premium (1 year)$21.991 Year
2 purchases

DutyCal

Subscriptions2
  • DutyCal Monthly3 Days trial$9.991 Month
  • DutyCal Yearly3 Days trial$99.991 Year

Questions

Is Calcifon free?
Calcifon is free to download, with in-app purchases available.
Is DutyCal free?
DutyCal is free to download, with in-app purchases available.
Which has better reviews, Calcifon or DutyCal?
Calcifon and DutyCal are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Calcifon or DutyCal have ads?
Neither Calcifon nor DutyCal shows ads.
Which is updated more often, Calcifon or DutyCal?
Calcifon ships an update every 2 months, and DutyCal every 4 days. Most recently, Calcifon was updated on November 12, 2026 and DutyCal on October 31, 2026.

Other comparisons