Copper Bar: steady in 4:00
Beat the benchmark4:00
COPPER-BAR
- Linear profile, hot on one side, cold on the other
- No account, no ads, no in-app purchases
- Logged run time shows in your Run log
Pick your first run
Three starting points, three different speeds. Tap a card, copy the name, and find it inside the app. Fastest plate wins your attention first.
Bimetal Seam: copper meets steel
BIMETAL-SEAM
- Cu and stainless steel joined along a kinked seam
- Logged steady in 23:21 on the sample run
- Probes P1, P2, P3 trace the gap on a ridgeline
Break the solver on purpose
CFL-SLIDER
- Lives in the Interactive Guide
- Drag the stability slider until the solver visibly blows up
- Learn why the time step dt has a limit
Not casino bonuses. Turne Haven has no wagering, no promo codes and no purchases. The codes above are the names of presets and tools to look for inside the app.
Inside the solver
Turne Haven slices your plate into cells and runs a finite-volume solver on them. Each step moves heat between neighboring cells, and you watch the whole field shift toward equilibrium while the clock runs. Seven engineering metals are on the palette: copper, aluminium, brass, iron, carbon steel, titanium and stainless steel. Each one conducts at its own pace, so a copper strip outruns a steel one in plain sight.
You decide what drives the plate. Hot and cold boundary conditions go on every edge, and the sample Copper Bar carries 40 hot edges and 40 cold edges. The readouts keep score with elapsed time, time step dt, residual, step count and a progress percentage. A log-scale residual chart shows the moment the run converges, and the Run log stamps the time to steady state, keeping up to 60 runs.
Reading the result takes seconds. The temperature field redraws at up to 30 frames per second. Marching-squares isotherms carry degree labels such as 140° and 20°, so you never rely on color alone. Flux arrows are optional. Up to four probes report live, and the Section A-A cutaway slices the plate into layered material bands with a live profile curve. All of it runs locally on your iPhone.
| App name | Turne Haven |
|---|---|
| Platform | iOS (iPhone) |
| Store ID | 6821318393 |
| Category | Education |
| Version | 3.0 |
| Account | Not required |
| Ads | None |
| In-app purchases | None |
| Data handling | Everything runs locally on the device |
| Developer | Not listed in the store material |
| App size, OS requirement, age rating | Not published in the store data we reviewed |
| Page checked | 14.11.2026 |
Race to steady state
Four moves, repeated until you can predict the heat before the solver shows it.
Build the plate
- Paint a custom plate cell by cell with seven metals
- Or start from one of six presets: Copper Bar, Bimetal Seam, Steel Window, Heat-Sink Comb, Four Corners, Cold Island
- Set hot and cold conditions on each edge in the EDGES tab
Run it fast
- Pause, Step, Reset, Clear and Log now sit in one row of large buttons
- Step the solver one tick at a time to catch the first ripple
- Hit Log now to save the run with its time to steady state
Read the field
- Drop up to four probes anywhere: circle for P1, square for P2, triangle for P3
- Watch the Probe traces chart run live, from 0 s onward
- Slide Section A-A up and down by row to see layered bands lit by temperature
Outrun your last result
- COMPARE plots every run on a log time axis; hollow dots mean not steady yet
- Save unlimited plates to the Shelf and sort by Recent, Name or Fastest
- Open the Materials Codex or the CFL slider to see why a run slows or fails
Instruments on your bench
Six tools that turn a phone screen into a thermal lab.
Seven-metal palette
Copper, aluminium, brass, iron, carbon steel, titanium and stainless steel, painted straight onto the plate.
Isotherms with degrees
Contour lines carry numeric labels, so every band of the heat map reads as a number.
Four live probes
Place them anywhere and follow their readings on a ridgeline chart, each with its own shape.
Section A-A cutaway
A slice through the plate shows material bands lit by temperature, with a live profile curve above.
Materials Codex
An animated heat front moves through any metal at its real thermal diffusivity.
Shelf and run history
Save unlimited plates and compare full run histories side by side, with a log of 60 kept runs.
Claim your lab bench now
Turne Haven is built for iPhone. No ads, no account, no in-app purchases. Install it, open a preset and your first plate is already warming up.
Download Turne HavenStore details on OS requirements and age rating are not published in the material we reviewed, so confirm them on the store page before installing. No advertising inside the app.