Free tools we made for ourselves.

Six small calculators and lookups we built for the testing lab. Each one runs entirely in your browser — no signup, no logs, no email.

Phone Compare

Compare any two phones, side-by-side

Pick any two phones from our database. We highlight the spec differences and pick a winner based on battery / weight / RAM / price.
Open the tool →
Battery Health Estimator

Estimate remaining battery capacity

Estimate your phone battery health from cycle count, age, and usage. Calibrated on Apple, Google, and Samsung published cycle ratings.
Open the tool →
Storage Calculator

Figure out how much storage you need

Tell us roughly what you keep on your phone — photos, video, music, games. We recommend a storage tier with 40% headroom.
Open the tool →
Can My Device Run iOS 27? (All Apple OS 27 Checker)

Check iOS 27 / iPadOS 27 / watchOS 27 / macOS 27 support

Compatibility checker for every 2026 Apple OS update. Pick your iPhone, iPad, Apple Watch, or Mac — see instantly if it runs OS 27, where it stops if not, and whether Apple Intelligence is available.
Open the tool →
Windows Error Code Lookup (0x… Fix Finder)

Look up any Windows 0x… error code

Search 57 Windows error codes — BSOD, Windows Update, boot, Outlook, activation, and more. Type a code like 0x80070020 and get the symptom, top fixes, and the full step-by-step guide.
Open the tool →
iOS Version Finder

Pick a model, see the max iOS version

Get the highest iOS version your iPhone can run, Apple's typical support window, and whether Apple Intelligence is available on your device.
Open the tool →