Support for PocketFlow

Questions, feedback or a bug to report? We’d love to hear from you.

Please contact us at: contact@aquaaxo.com.au

PocketFlow is developed by a solo engineer, and I personally read every message. I typically respond within 2–3 business days, but please allow a bit longer during busy times. If something isn't working, it helps to mention your iPhone model, your iOS version, and the PocketFlow version (Help → About).

Questions and answers

How do I get started?

Open Help and tap Quick start (new users also see it on Home). It walks you through seven steps, one action each, in about two minutes. Or open a template and press ▶: each one is ready to run.

How do the free trial and the unlock work?

PocketFlow is a free download. You can try everything free for 7 days, then one purchase unlocks it for good (A$14.99 / US$9.99, or the equivalent in your country). There is no subscription. Bought PocketFlow before? You are already unlocked.

I bought it, but it still asks me to unlock.

Open Help and tap Restore Purchases. It asks the App Store again for your Apple Account. Make sure you are signed in with the Apple Account you bought it with.

How do I turn the sound or the haptics off?

Tap the two buttons beside Tilt, or go to Look → Feel & hear the water and turn Feel or Sound off. Sound also follows your iPhone’s silent switch.

How do I bring in my own model?

In 3D, tap Build → Import STL…, or open an STL in PocketFlow from Files, Mail or AirDrop. Pick what it was made in (mm, cm, m or inches). Actual size keeps its real size and heights; if the tank is too small, Add and fit tank grows the tank around it.

Why doesn’t water flow in through an open side?

A side held at a Water level only lets water flow out unless Allow inflow is on. Go to Sides, tap the side, and turn on Allow inflow: water then flows in up to the set level, even into a dry tank. A side that is Open to air has no water beyond it, so nothing flows in there. For a set velocity or flow rate, make the side an Inlet instead.

How do I change the simulation resolution?

Go to Look → Quality and pick Fast, Balanced or Detailed (the same three in 2D and 3D). Detailed uses smaller cells for more detail but runs slower; Fast is quicker but coarser. Changing quality restarts the flow; your drawing and shapes stay.

Tilt doesn’t do anything.

Tilt reads the motion sensor, so it needs a real iPhone; it can’t work on a device without one, such as a simulator. Tap Tilt to turn it on, tip your phone, and tap Tilt again to stop.

Where are my scenes saved?

On your iPhone, inside the app. Scenes save automatically as you work: Home shows the latest under Continue and the rest under Your scenes. Touch and hold a scene to rename, duplicate or delete it. Nothing is uploaded; deleting the app deletes your scenes.

How do I share what I made?

Use the Share button to send a photo or a 10-second clip of your flow. A Section Plot shares as a picture or as data (CSV). If you save to Photos, iOS asks your permission first.

How do I start fresh?

Go to Help → Settings → Reset PocketFlow. It deletes every scene and resets every setting, and brings back the tips and Quick start. It can’t be undone.

Can I use it for engineering design?

PocketFlow solves real water physics live on your iPhone. It is made for learning, exploring and quick what-ifs; it is not a certified engineering design tool, so check real designs with proper engineering analysis. Full-scale values use Froude similarity: gravity-driven flow scales, while friction and surface tension don’t.

Do I need an account or an internet connection?

No. There is no account, no ads and no tracking, and PocketFlow works offline. It collects no data; see the Privacy Policy.