Yes. All core features are free and always available. Optional rewarded videos unlock small extras (such as extra history capacity or a themed export), but nothing essential is behind a paywall.
SipPing follows your device language (English and Simplified Chinese are supported). Change it in iOS Settings → General → Language & Region.
All data is stored locally on your device. It is removed if you delete and reinstall the app. We have no server copy — that is also your privacy guarantee.
Videos need an internet connection and occasionally fail to fill. Wait a moment and tap again. If it keeps failing, the ad may not be available in your region — the feature it unlocks is never required for core use.
Use the share/export entry on the result screen. You can copy a text summary or save a result card, depending on the tool.