Practical guides on leveling, DIY projects, and phone-based measurement tools. Written for tradespeople, DIYers, and anyone who wants to get things straight.
Tested and ranked: the top spirit level apps with accuracy data, feature breakdowns, and real-world results.
Step-by-step guide to turning any smartphone into a precision spirit level — no download needed.
Real accuracy measurements comparing phone spirit levels to traditional bubble levels and laser levels.
An honest side-by-side comparison so you can choose the right tool for your situation.
Complete breakdown of all three level types — cost, accuracy, use cases, and when each tool wins.
The two-point calibration method that eliminates sensor bias and gets your phone reading within ±0.2°.
Fix inaccurate readings, sensor drift, and calibration issues with this step-by-step diagnostic guide.
The science behind phone-based leveling — accelerometers, tilt sensing, filtering, and accuracy limits.
Everything from the 1661 origins to modern digital and phone-based levels — a complete reference.
From spirit levels to stud finders to tape measures — the hardware tools your smartphone already handles.
Professional picture-hanging techniques using tools you already own — including your phone.
The complete guide to installing floating shelves that stay level, hold weight, and look perfect.
Step-by-step TV wall mounting guide — bracket types, stud finding, level checking, and cable management.
Accurate floor-level testing methods before laying hardwood, tile, vinyl plank, or laminate.
The full process for hanging wall and base cabinets perfectly level on walls that are never quite plumb.
How to test walls for plumb before tiling, paneling, or building against them — and what to do if they're not.
Professional tiling techniques for a flat, level finished surface — substrate prep, lippage limits, and grouting.
Setting fence posts plumb and level in concrete — layout, digging depth, bracing, and common mistakes.
Calculate, measure, and build the correct drainage slope — the 1-in-50 rule, joist planning, and verification.
How to measure, calculate, and cut accurate angles for stair handrails, balusters, and ADA-compliant ramps.
Works on any phone or tablet. No download required. Pro features from $10 one-time.
Open Spirit Level ProNo account needed · Works offline · 20 languages