# Guides

Each guide answers one question in its first sentences.

- [How do I back up iPhone contacts without iCloud?](https://aivanaapps.com/apps/backup-contact-plus/guides/backup-contacts-without-icloud/): Export a contact list as a vCard from the Contacts app and keep that file. iCloud is optional. Export each account, because Gmail and Exchange are separate.
- [How do I get water out of my iPhone speaker?](https://aivanaapps.com/apps/speaker-cleaner/guides/get-water-out-of-iphone-speaker/): Point the speaker down, let the iPhone dry, and only then try a short tone. A tone may help the grille. It will not dry the port.
- [How can I identify an object from a photo?](https://aivanaapps.com/apps/trove/guides/identify-object-from-photo/): A clear photo can produce a likely name and a value estimate. Both can be wrong. Check them, and never eat a mushroom based on an app or a photo.
- [iPhone dropped in water, what should I do first?](https://aivanaapps.com/apps/speaker-cleaner/guides/iphone-dropped-in-water/): Get it out, unplug it, and do not put it in rice. Tap the connector downward, wipe it, and let it dry before you charge with a cable.
- [How do I level an RV or camper with my phone?](https://aivanaapps.com/apps/level-tool/guides/level-rv-with-phone/): Use the phone as a rough pitch and roll check, then follow the RV maker's own steps. Phone sensors are approximate and are not the only tool for a setup that affects safety.
- [How much is my coin worth?](https://aivanaapps.com/apps/trove/guides/how-much-is-my-coin-worth/): Date, mint mark, condition, and what buyers actually paid decide a coin's price. An app estimate is a start, not an appraisal. Check sold listings and a dealer if it might be valuable.
- [Is there a white noise app that works offline with no ads?](https://aivanaapps.com/apps/driftly/guides/offline-white-noise-app/): Driftly plays white, pink, and brown noise, plus rain and fan sounds, from the iPhone with no ads and no account. It is not a treatment for insomnia.
- [How do I use my iPhone as a level?](https://aivanaapps.com/apps/level-tool/guides/iphone-as-level/): Open the Measure app, tap Level, and hold the iPhone to the object. Apple says the reading is approximate. Use a real level for structural work.
- [Can I use my phone as a dog clicker?](https://aivanaapps.com/apps/dog-clicker/guides/phone-as-dog-clicker/): Yes, if the phone plays one short consistent sound and you reward right after it. A physical clicker is easier one-handed. The phone works when that is what you have.
- [Why does my speaker sound muffled after getting wet?](https://aivanaapps.com/apps/speaker-cleaner/guides/speaker-muffled-after-water/): A muffled speaker after a splash is often water still in the grille. Give it time to dry. If it is still muffled a day later, it may be damaged.
- [How do I start clicker training a puppy?](https://aivanaapps.com/apps/dog-clicker/guides/start-clicker-training-puppy/): Charge the clicker first: click, then a tiny treat, repeated in a quiet room. Keep sessions to a few minutes. Teach a skill only after the click predicts food.
- [What frequency ejects water from a phone speaker?](https://aivanaapps.com/apps/speaker-cleaner/guides/water-eject-frequency/): Apple does not publish a water-eject frequency for iPhone. A low tone near 165 Hz is a common unofficial choice, and it only has a chance of helping the grille.
- [How do I transfer contacts to a new iPhone?](https://aivanaapps.com/apps/backup-contact-plus/guides/transfer-contacts-new-iphone/): Use Quick Start or iCloud Contacts if both phones share an Apple Account. If you are not using iCloud, export a vCard and open it on the new iPhone.
- [White, pink, or brown noise: which is best for sleep?](https://aivanaapps.com/apps/driftly/guides/white-pink-brown-noise/): They sound different, and none is the proven best for sleep. White hisses, pink is smoother, brown rumbles. Evidence that broadband noise improves sleep is weak.