Sonar Ruler vs Spacemap

Sonar Ruler is a winner in the Best App Ever Awards - "Most innovative use of iPhone hardware" category! The Amazing New Sonar Ruler is an experimental app that uses echoes to measure distances with your iPhone! It uses the same principles that dolphins use to find food! It sends a short pulse from the speaker and measures how long that pulse takes to bounce off of something and return to the phone. It then estimates how far away you are. Use two devices to find the distance between them, without any wifi connection! Use "quiet" mode - with ultrasonic frequencies most people can't hear! Impress your friends with what this unique app can accomplish using only an iphone! GIZMODO.com: "that's a damned neat trick for a phone to be able to do." Features: - Set Units to feet, inches, or meters - Custom saved settings for measuring in different environments If you're a teacher, this app is a great way to teach students the principles of sonar, and how sound propagates through air. Enjoy! Follow us on twitter @LaanLabs NOTE: This is an experimental app, although it can be quite accurate, any measurements taken should be verified before using them.

“iPhone Storage Full” again? Which videos and photos are actually taking the space? Will compressing lose the date, the location or the album? Why didn't free space go up after you deleted things? Spacemap draws your photo library as a map by size, tells you what you can save, and replaces only what you choose with smaller copies. You see the difference first, and the originals stay recoverable for 30 days. SEE WHAT'S USING THE SPACE • A map of 4K videos, other videos, photos, Live Photos, screen recordings and screenshots • Space used by each year • Reasons ranked by how much you can save • Sizes are read without downloading originals from iCloud SHRINK VIDEOS, KEEP WHAT MATTERS • Largest videos first, nothing selected until you choose • Frame rate, HDR and Dolby Vision are kept • Four quality levels, from keeping every pixel to 720p • Watch a preview, then compare the same frame or play both side by side SHRINK PHOTOS AND SCREENSHOTS • Each photo is tried at several settings and the smallest file that passes a quality check is kept • Photos that are already small are left alone • Compare at full size before you replace MAKE LIVE PHOTOS YOURS • Drag to any frame and keep it as a still photo • Keep the original photo, several frames, or both NOTHING IS REPLACED ON TRUST • Each new file is checked before the original is removed. If a check fails, the original stays • Date, location, favorite, caption, keywords, rating and position in albums carry over • Originals move to Recently Deleted, where you can recover them for 30 days • Spacemap tells you when space returns, and how to empty Recently Deleted ALSO • Before You Shoot: how many minutes of video fit right now • Limited Access is supported • iCloud and iPhone storage are explained separately • Filters by year, month, size and video length • A Home Screen widget for free space • Send smaller: fit a video under 10, 25 or 50 MB, or a photo under 1, 2 or 5 MB, without changing your library • A Lock Screen widget and a Control Center control show how many minutes of video still fit Free to download: the first 1 GB is free, then a one-time Spacemap Pro purchase replaces without a limit. No account, no ads, no subscription, no data collected. Everything runs on your iPhone. Spacemap works only with your photo library. It can't reduce apps or System Data.