iOS · iPhone & iPad

Learn how to use Time & Date Calc - Aviation

This page matches the iOS app structure: four bottom tabs (Time Tools, Date Tools, Utilities, Settings), lists of tools inside each tab, and navigation stacks. Labels come from the app’s route titles (for example “Smart Time calc”, “Aviation forecast”). If a future update renames a row, trust the on-screen text.

For the Android edition, see Learn how to use (Android).

On this page

Bottom tabs & lists

  1. Open Time & Date Calc - Aviation on your iPhone or iPad.
  2. Use the tab bar at the bottom to switch groups:
    • Time Tools — rows for Smart Time calc, Aviation forecast, and Fuel Calculator (in that order).
    • Date Tools — Date Calculator, Date Difference, Age Calculator, Workdays Calculator.
    • Utilities — Calculator, Time Zone Converter, Countdown Timer, Expense Splitter.
    • Settings — opens the Settings screen directly (gear tab).
  3. Inside a tab, each tool is a tappable row with title, subtitle, and chevron. Tap the row to push the tool onto that tab’s navigation stack.
  4. Use the back control in the navigation bar (or edge swipe) to return to the list. Switching tabs preserves each stack until you leave the app, subject to iOS memory rules.

Time Tools

Smart Time calc

  1. Tab Time Tools → tap Smart Time calc (subtitle: add, subtract, multiply & divide time).
  2. Use the on-screen keypad and display. Free users use the basic layout; full layout (multiply/divide) requires Premium—if you choose full without Premium, the app prompts you toward the paywall.
  3. Toolbar actions typically include clear, Record, History, and backspace—use them as labeled on your build.
  4. On iPad, layout may split display and keypad differently; behavior is the same logically.

Aviation forecast

  1. Tab Time Tools → Aviation forecast.
  2. Use the segmented control for Time vs Date mode.
  3. Time — enter the hour-style fields shown (current AF/ENG hours, life expired, installed-at, due-at, etc.—follow labels on screen). Optional component name and tag. Tap calculate and read current component hours, life remaining, and due targets as presented.
  4. Date — choose manufacture or installed anchor, set interval with unit (years, months, weeks, days; decimals if offered), then read due-on date and life remaining.
  5. Open history from the navigation area when available; time and date runs are kept distinct where the app provides separate lists.

Fuel Calculator

Planning aid only—always comply with your operator, regulator, and approved flight-planning process.

  1. Tab Time Tools → Fuel Calculator.
  2. At the top, choose Pilot (trip planning) or Ground (average burn from a known total).
  3. Pilot mode
    1. Pick a flow unit (for example litres per hour or US gallons per hour) so cruise flow and quantities stay consistent.
    2. Enter cruise fuel flow and trip time (often via the custom time keypad).
    3. Set contingency using a preset percentage or a custom value, depending on what the screen offers.
    4. Choose a final reserve rule (such as day VFR, night VFR, IFR, or a custom minute value).
    5. For alternate, switch between entering extra fuel as a volume or as a time at cruise flow—whichever matches how you brief.
    6. Add taxi and extra fuel if your SOP includes them.
    7. Optionally fill flight number and route for your own notes.
    8. Tap Calculate. Read the breakdown (trip, contingency, reserve, alternate, total) and compare against tanks or policy. Read any on-screen disclaimer.
    9. Open History from the toolbar when you need to reuse or audit a past profile.
  4. Ground mode
    1. Enter total fuel on board (or loaded) in the selected quantity unit.
    2. Enter flight or block time for the segment you are analyzing.
    3. Add an optional aircraft label if you want it in history.
    4. Tap Calculate to read average burn rate in your flow unit.
  5. On iPhone in pilot mode, a bottom sheet keypad may appear for time or numeric fields—dismiss it by swiping down or using the gap above the sheet, as the UI indicates.

Date Tools

Each tool lives under the Date Tools tab. Open the row, enter dates or options per the form, then calculate. Age Calculator may navigate to related detail (milestones, etc.) from the result—follow in-app buttons.

  • Date Calculator — add or subtract from a date.
  • Date Difference — span between two dates.
  • Age Calculator — age between birth date and reference date; history cap is lower on the free tier than other tools.
  • Workdays Calculator — business days between dates; weekend handling per app; holidays if the UI exposes them.

Utilities

Calculator

Tab Utilities → Calculator. Standard arithmetic (not time units). Toolbar includes history, records, clear, and backspace consistent with Smart Time calc patterns.

Time Zone Converter

Pick zones, set a time, read the paired result; history stores frequent conversions.

Countdown Timer

Create timers from the list screen. Grant notifications when iOS asks if you want alerts at completion. Free tier: limited number of simultaneous active incomplete timers. Completed timers may appear in a history list with free-tier retention limits.

If notifications were denied, Settings can surface a shortcut to open system notification settings for the app when that row is shown.

Expense Splitter

  1. Tab Utilities → Expense Splitter. You should see a list of trips (or an empty state with a way to add your first trip).
  2. Start a trip: use Add trip (or equivalent), give it a name, and optionally set start/end dates if the form provides them—dates help you tell similar trips apart later.
  3. Open the trip row to enter the trip workspace. The navigation stack stays under Utilities so you can return to the trip list with Back.
  4. Add people who are sharing costs: use first name and optional last name; the app builds a display name for ledgers and settlements.
  5. Add each expense:
    • Enter the amount.
    • Choose Paid by from the people you added (add people first if the menu says to).
    • Add an optional note or pick a category when offered—handy for meals, fuel, lodging, or transport.
  6. Watch the running total and item count update as you add lines—sanity-check against receipts.
  7. When the ledger is ready, tap Calculate (or the result action shown on screen) to see:
    • Each person’s fair share of the trip total.
    • Balances (who over-paid vs under-paid relative to that share).
    • A short settlement list: suggested “pay from A to B” transfers that clear balances with fewer transactions.
  8. Edit people or expenses if someone joins late or a bill is corrected, then run Calculate again.
  9. Use History or past snapshots when the app offers them to review a closed trip later.

Settings

  1. Open the Settings tab (gear).
  2. Use the search field at the top to filter sections when present.
  3. Premium — when not subscribed, you’ll see benefits (no ads, advanced features & export, unlimited history), Go Premium, and Restore Purchases.
  4. Appearance — theme mode and accent color.
  5. Calculator preferences — default opening calculator, haptics, sound effects, decimal places, date format, time format, first day of week.
  6. Privacy & Security — optional link to enable notifications if denied; links to this site’s Privacy policy and Terms of Service.
  7. About — version, rate and share (when available on your build), Send Feedback (email).

History, records, limits & export

  • Each calculator type keeps its own history so entries do not mix between tools.
  • Duplicate suppression avoids stacking identical runs where implemented.
  • Free tier: 10 history entries per type in most tools, 5 for Age Calculator; 10 records where Records exist; countdown and export limits as in the live app.
  • Premium: broader history and records where the app allows; export to CSV/PDF/text where the tool exposes share actions, subject to any fair-use messaging after export.

Tips & permissions

  • Ads — banner placement respects safe areas; interstitials may appear between sessions on free tier. Premium removes ads.
  • App Tracking Transparency — the free build may request permission to track for ad relevance; you can decline in the system dialog.
  • Internet — needed for ads and StoreKit product loading; not used to upload your calculation payloads to KavNik.
  • Data safety — uninstalling the app removes local app data unless iOS backup/restore applies.

← Back to app overview