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
Free checker for every 2026 Apple OS update. Pick your iPhone, iPad, Apple Watch, or Mac to see if it runs OS 27 and if Apple Intelligence works.
Open the tool →Error Code Lookup
Look up any Windows 0x… error code
Search 57 Windows error codes — BSOD, Windows Update, boot, Outlook, activation. Type a code like 0x80070020 to get the symptom and the top fixes.
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 →