Simple apps, made with care.

Mountain Buffalo Limited builds focused apps for the things people actually do — from keeping track of family time to keeping an aircraft ready to fly, and the occasional puzzle in between.

KidsTimeParenting time log
HexdHexagon puzzle game
Hangarfolio SoonAircraft maintenance
KidsTime app icon
Utilities

KidsTime

Know exactly how many nights your kids have spent with you — every month, every year — without keeping a spreadsheet.

  • Tonight at a glanceSee who's with you tonight and confirm it with one tap. Plans changed? Override just that night.
  • A calendar that does the countingEach child gets a color. Monthly and yearly totals, your share of all nights, and how you're tracking against what was agreed.
  • Private by designYour records stay on your device. No account, no sign-up.
  • Reports you can share (Pro)Timestamped PDF or CSV exports that show every edit, plus recurring schedules and a home screen widget.
Download on theApp Store Free · iPhone
KidsTime Today screen showing who is home tonight KidsTime calendar view KidsTime recurring schedule setup
Hexd gameplay on a hexagonal grid Hexd gameplay screenshot Hexd gameplay screenshot
Hexd app icon
Games

Hexd

A relaxing combine-'em-up puzzle on a hexagonal grid. Slide, merge, and see how high you can go.

  • Easy to learnSwipe to shift every hexagon. When two with the same number touch, they combine.
  • Hard to put downThe hex grid adds a whole new dimension to the classic number-merging puzzle — every move reshapes the board.
  • Chase a high scoreClimb the leaderboard and beat your own best.
Download on theApp Store Free · iPhone
Hangarfolio app icon
Coming soon · Aviation

Hangarfolio

Know it's ready before you drive to the airport. Aircraft maintenance and management for owners and flying clubs.

  • Every inspection, by date or tachAnnual, oil, VOR, transponder and more, with reminders before they're due.
  • Squawks with photosLog maintenance issues the moment you spot them and track them to resolution.
  • Flights and real costsRecord flights with engine metrics and see what your aircraft really costs to operate.
  • Built for sharingShared access and roles for flying clubs, schools and co-owners.
Learn more at hangarfolio.com iPhone · iPad · Mac
Hangarfolio status screen showing inspections due Hangarfolio squawk list Hangarfolio operating cost ledger