01New · 2026
iPhone · Education
iTurbo3D
Hold a living three-dimensional turbulence simulation in your hand. Orbit the flow, switch scientific fields, and inspect the energy spectrum in real time.
Independent Apple developer · Sweden
Apps with
curious minds.
From turbulence you can touch to everyday tools that respect your privacy — small, focused apps built to make complex things feel clear.
- 10
- apps available
- 2009
- first release
- 0
- accounts required
Navier–Stokes
Real-time Metal
Fluid dynamics ✳ Chaotic systems ✳ Everyday utility ✳ Privacy by default ✳ Fluid dynamics ✳ Chaotic systems ✳
The complete collection
Ten ideas,
built to explore.
02New · 2026
Mac · Education
3DTurbo
Real-time 3D turbulence on the Mac, pairing a spectral Navier–Stokes solver with a GPU volume ray marcher and live scientific diagnostics.
03New · 2026
iPhone · Food & Drink
Protein Energy
Scan packaged food and see its protein-to-energy ratio at a glance. Save products and recipes locally, with no account, ads, analytics, or tracking.
04Mac
Mac · Education
2DTurbo
A 2D turbulence simulator, CPU benchmark, and desktop background tool that turns numerical fluid dynamics into a live visual surface.
05Updated · 2026
iPhone · Education
iTurbo
Direct numerical simulation of two-dimensional incompressible turbulence, updated for modern iPhones with richer resolution and higher Reynolds numbers.
06Updated · 2026
iPhone · Education
Mechanical Pendulums
Explore double through octuple pendulums, now rendered edge-to-edge in Metal. Tilt your phone and watch order tip beautifully into chaos.
07iPhone
iPhone & iPad · Education
Kutta Joukowski
Shape an airfoil with your fingertips and see the streamlines and pressure distribution respond — an interactive introduction to aerodynamic lift.
08iPhone
iPhone · Education
Double Pendulum
A simple physical system with wonderfully complex behavior. Tilt your device to influence a Runge–Kutta simulation of coupled motion.
09iPhone
iPhone · Education
Triple Pendulum
Three linked pendulums turn deterministic equations into surprising motion. A pocket-sized demonstration of sensitivity and chaos.
10Updated · 2026
iPhone · Medical
ATimer
A visual timer that makes remaining time easy to understand. Designed for routines, focus, homework, and anyone who benefits from seeing time.
No apps in this view.
Independent since 2009
Built by Torbjörn Sjögren
Serious ideas.
Playful interfaces.
ManneTroll Solutions is a one-person software studio in Sweden. The work sits where computational physics, practical tools, and the pleasure of understanding something meet.
No growth loops. No sprawling platforms. Just focused native apps that do one interesting thing well.