Now on iOS

Thread Tension Guide

Instantly determine the correct needle size and thread weight combination for specific fabric types to prevent sewing machine jams.

Education iOS Paid subscription

Hard paywall: Premium subscription (weekly, monthly or yearly) or a one-time Lifetime purchase unlocks the full app.

Auto-renews monthly via Apple's standard subscription system.
Cancel anytime in Settings → Apple ID → Subscriptions.
Refunds are handled by the store that took the payment, under its own policy: Apple at reportaproblem.apple.com, Google Play and the Microsoft Store through your account with them.
No third-party tracking or analytics SDKs inside the app.

Your contact list, photos, location, microphone, or camera.
Any content you enter into the app (notes, logs, data) — it stays on your device unless you explicitly sync.
Identifiers used to track you across other apps.

Full details in our privacy policy.

Thread Tension Guide is live on the App Store. Download it here — listed as Thread Tension Guide. Questions? Email [email protected].