Pipe Sizer vs Oil Change Reminder

PipeSizer helps you quickly choose the right pipe diameter for water systems — for both pressure and gravity flow. PRESSURE PIPE SIZING • Size pipes from a target flow rate. • Set your maximum friction rate and velocity limits. • Calculations based on the Hazen-Williams equation. GRAVITY PIPE SIZING • Size pipes from a target flow rate. • Evaluate flow capacity and velocity under gravity conditions. • Calculations based on the Manning equation. KEY FEATURES • Automatic recommended pipe size based on your limits. • Multiple pipe materials with built-in coefficients (more added over time). • Works in both SI and Imperial (I-P) units. • Designed for engineers, plumbers, and irrigation/drainage design workflows. Feedback is welcome — it directly shapes upcoming updates.

Oil Change Reminder does one thing properly: it tells you when your car is next due for an oil change. WHICHEVER COMES FIRST Manufacturers never write a service interval as just a date. They write it as "12 months or 12,000 miles, whichever comes first." Most reminder apps only understand the date half, which quietly gives the wrong answer to anyone who drives a lot. This app tracks both halves and tells you which one is going to run out first. Set each car to time only, distance only, or both. IT LEARNS HOW MUCH YOU DRIVE A mileage limit is no use if you have to open an app every week to check it. Enter your odometer now and then, and Oil Change Reminder works out roughly how far you drive per day — so it can turn "600 miles to go" into a date, and remind you on it. EVERY CAR IN THE GARAGE Cars, vans, motorcycles, boats. The free app keeps one vehicle; the full version keeps as many as you like. Each one gets its own interval, its own colour and its own reminders. A glance at the garage tells you which are fine and which need booking in. YOUR HISTORY, KEPT Every oil change you log — date, mileage, oil type, filter, cost, workshop — stays with the car. It all syncs through your own private iCloud account, so a new phone picks up exactly where the old one left off. BUILT PROPERLY • Miles or kilometres, your choice • Reminders at a time of day you pick, with a heads-up before the due date • Odometer check-ins, so distance tracking stays accurate • Works fully offline • No account, no sign-up, no ads, no tracking • Your data is yours: it lives on your devices and in your iCloud, nowhere else Made for iPhone and iPad. FREE, WITH ONE OPTIONAL UNLOCK Every feature above is free for one vehicle — reminders, full history, iCloud sync, no ads and no tracking. Keeping more than one car takes a single one-time purchase. No subscription, ever. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://frekvens.ai/apps/oilchangereminder/privacy