Free tools we made for ourselves.
Small calculators, checkers, and lookups we built for the testing lab. Each one runs entirely in your browser — no signup, no logs, no email.
Tracking Check
Is my phone being tracked? Find out safely
Worried your phone is being tracked? Answer a few questions about your iPhone or Android. We weigh the signs of stalkerware, hidden trackers, and account access, then give you a calm risk read and safe next steps. Runs entirely in your browser.
Open the tool →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
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 →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 →Error Code Lookup
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 →