Comparison

Shift Calendar vs OffshorePro

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

Head to head
About

Shift Calendar

Features
Read full description

Set your rotation once and see the whole year ahead. SIMPLE Pick your pattern β€” 4 on 4 off, 2-2-3, DuPont, twelve-hour days and nights, rotating three shifts β€” then tap the day of the cycle you are on today. Done. No sign-up, no account. YOUR OWN ROTATION Nothing on the list fits? Build a cycle of any length yourself. Hospital rotas, irregular rotations, on-call. WHAT YOU GET β€’ When your next shift starts, and how long until it does β€’ A whole month on one screen β€’ Your shifts in the iPhone Calendar, kept up to date β€’ A reminder before every shift, even offline β€’ Hours worked and estimated pay β€’ A home screen widget β€’ Backup and restore, to move to a new phone β€’ In 31 languages Without a purchase you see this month's calendar and your next shift. Other months, editing days, your own rotation, Calendar sync, reminders, hours and pay, the widget and backups come with Shift Cycle Pro, an in-app purchase. CHANGES Swapped a shift? Tap the day and change it. Add a note. Your rotation stays intact around it, and your Calendar and reminders follow. WHAT WE PROMISE A lifetime purchase stays a lifetime purchase. We will not move it to a subscription later, and we will never put ads in this app. We never see your shifts. No server, no account, no tracking β€” your rotation stays on your phone. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://anilsancarr-web.github.io/shiftcycle-site/privacy/

About

OffshorePro

Features
Read full description

OffshorePro is the app built for offshore workers. Keep your rotation, documents and onboard finances in one place β€” and it works even without internet. KEY FEATURES β€’ Rotation & schedule β€” log embarkations, time off, overtime and vacation. Auto-rotation generates your cycles. β€’ Documents with expiry alerts β€” snap a photo and OCR fills in the type, number and dates. Alerts 90, 60, 45 and 30 days ahead (ASO, BOSIET, CBSP, STCW and more). β€’ Pay & finances β€” preview your cycle (gross, net and tax), generate PDF timesheets and expense reports, and check your payslip. β€’ Shift handover with AI β€” pick your notes and the AI organizes a handover report ready to export (Premium+). β€’ Sky & direction β€” find North and South with no instruments, using the Sun and stars, with a live compass. β€’ Weather & sea β€” forecast, sea conditions and tides for your position. β€’ Offshore map β€” coastal basins, blocks and fields with offline bathymetry. β€’ Tools β€” distance and azimuth (lat/long or UTM), currency and unit converters, time zones, airport and port status. β€’ Digital vault β€” keep sensitive documents encrypted and behind biometrics. β€’ Widget β€” your mission, at-risk documents and next events on your Home Screen. Offline-first: your data stays on your device. PREMIUM and PREMIUM+ The subscription unlocks advanced features such as cloud OCR, PDF reports, payslips, AI shift handover, the digital vault and more. β€’ Premium: R$ 14.90/month or R$ 149.90/year β€’ Premium+: R$ 24.90/month or R$ 249.90/year Subscriptions auto-renew for the same period and price unless cancelled at least 24 h before the end of the period. Payment is charged to your App Store account at confirmation. Manage or cancel in Settings β€Ί Apple ID β€Ί Subscriptions. Terms: https://offshorepro.com.br/termos Privacy: https://offshorepro.com.br/privacidade

Screenshots

Shift Calendar4 screens
OffshorePro4 screens

Verdict

The call

The clearest difference is iOS requirement: Shift Calendar at 16.4 against OffshorePro's 26.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Shift Calendar sells 2 in-app purchases, starting at $2.99 per month and OffshorePro sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Shift Calendar ships an update every 3 weeks, OffshorePro every 2 weeks. Both last shipped on October 26, 2026.

Scorecard1 real difference Β· 5 level
Shift Calendar versus OffshorePro: the parameters behind the verdict, then further details
ParameterShift CalendarOffshorePro
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad β€” better
Requires iOS16.4 β€” better26.5
Further details β€” not scored
Size45 MB22 MB
Age rating4+4+
Developeranil sancarOffshorePro

In-app purchases

2 purchases

Shift Calendar

Subscriptions1
  • Monthly7 Days trial$2.991 Month
One-time1
  • Pro$14.99
4 purchases

OffshorePro

Subscriptions4
  • Premium Mensal$1.991 Month
  • Premium+ Mensal$3.991 Month
  • Premium Anual$22.991 Year
Show 1 more
  • Premium+ Anual$39.991 Year

Questions

Is Shift Calendar free?
Shift Calendar is free to download, with in-app purchases available.
Is OffshorePro free?
OffshorePro is free to download, with in-app purchases available.
Do Shift Calendar or OffshorePro have ads?
Neither Shift Calendar nor OffshorePro shows ads.
Which is updated more often, Shift Calendar or OffshorePro?
Shift Calendar ships an update every 3 weeks, and OffshorePro every 2 weeks. Most recently, Shift Calendar was updated on October 26, 2026 and OffshorePro on October 26, 2026.

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