ehcrea.

iPhone apps, engineering tools, 3D design and printing.

APPS

Renew: Replacement Tracker
Never forget to change a filter again. Renew reminds you when it's time to replace filters, brush heads and everything else that wears out. For iPhone, iPad and Mac.
Coming soon on the App Store · Learn more

Balcony Bloom: Cozy Garden
A cozy garden game for iPhone and iPad. Plant, water and harvest in real time, decorate your balcony and welcome feathered and furry visitors.
Coming soon on the App Store · Learn more

ENGINEERING TOOLS

Free calculators for mechanical and precision design. They run in your browser, no install or account needed.

Precision Engineering Calculators
Flexures, beam theory, Hertz contact, buckling, motion profiles and thermal effects, based on the JPE Precision Point formulas. Live dimensioned sketches, metric or US units, PDF reports, in English, German, Dutch and Turkish.
Free · runs in your browser · Open calculator

Cold Plate Calculator
Size liquid- and gas-cooled cold plates for power electronics, batteries and fuel cells. Place heat sources, see a 2D temperature map, pressure drop, pump operating point and flow per channel, then export a PDF design report.
Free · runs in your browser · Open calculator

Tolerance Chain Calculator
1D tolerance stack-ups with ISO 286 fits, ISO 2768 general tolerances, play and thermal expansion. Worst case, RSS and Monte Carlo results with pass/fail, Cpk and contribution charts.
Free · runs in your browser · Open calculator

3D DESIGN & PRINTING

Custom 3D-designed and 3D-printed gear for photography and video: mounts, adapters, rig parts and accessories, from first sketch to finished part.

Backed by years of experience in electronics packaging for the defense industry. More about me →

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