cryptoscreen vs FlySense

cryptoscreen is a private note app for messages that should not last. Write a note, choose a six-digit PIN, and cryptoscreen encrypts the message on your iPhone before it leaves the device. Share the generated link and send the PIN separately. The recipient can read it once in the iOS app, with an App Clip, or in a web browser when you allow web reading. No app download is needed for browser reading. CHOOSE HOW YOUR MESSAGE CAN BE READ Allow app and web reading for easier sharing, or choose app-only reading. Both the link and the PIN are required. Web-enabled messages are decrypted in the recipient's browser and become unavailable for another read after they are opened. ONE-TIME MESSAGES - Encrypt notes locally before upload. - Open normal messages once, then make them unavailable to other readers. - Destroy a message after the third wrong PIN attempt. - Let unopened links expire after the retention window. - Check availability in Sent Messages, including messages opened on the web. GUARDED READING ON iOS The iOS app and App Clip use a guarded reader to reduce casual screen exposure. The reader clears when iOS reports a screenshot. Screenshot protection is best-effort: iOS reports normal screenshots after capture. Browsers cannot provide the app's screenshot detection or capture protection, and no app can protect against external cameras or compromised devices. TEXT IS FREE. IMAGE SENDING IS PRO. Send text-only messages and read received text and images for free. Pro lets senders attach encrypted images. Restore purchases and manage your subscription from Settings. cryptoscreen does not require accounts, profiles, or contact lists. Messages are encrypted before upload; the service stores encrypted content and the metadata needed for expiry, PIN attempts, and message availability. Optional interaction-status sharing is off by default. Support: https://cryptoscreen.app/support Privacy Policy: https://cryptoscreen.app/privacy

Before the props spin, check the ground you are standing on. FlySense turns your phone into seven instruments that answer one question: is this spot good enough to take off from? Everything is measured and judged on the device - no account, no sign-up, no server. LOCATION & HEADING Coordinates, altitude above sea level (GPS corrected with an EGM96 geoid grid) and a compass dial over a vector map. With a barometer, you also get height relative to a reference point. SHOOTING DIRECTION Sun azimuth and elevation computed astronomically, so you know which way to shoot without flying into backlight. Sunrise, sunset, civil twilight and day length - with the night rule differences between countries shown side by side (Korea and Japan go by sunset, EASA and FAA by civil twilight). MAGNETIC INTERFERENCE Field strength, interference (measured versus expected from the World Magnetic Model) and dip angle. Rebar, buried pipes and parked cars distort the field your drone's compass depends on - FlySense tells you to move a few steps before it becomes a fly-away. LEVEL Tilt from vertical computed straight from the gravity vector, plus which side to shim. A tilted launch surface is where a lot of bad takeoffs begin. ANTENNA AIMING Tap the map to mark where your drone will be, then aim: absolute bearing, distance and how many degrees to turn - on the map and through the camera in AR. VIBRATION Press the phone to the frame and measure. RMS, peak, event count, a three-axis waveform and an FFT spectrum. Enter your hover RPM and FlySense matches the dominant frequency to 1x or 2x order - telling propeller imbalance apart from blade damage or frame resonance. TRACK & ALTITUDE Records your path and altitude, and keeps recording with the screen off. GPS drift is filtered out by a fix-quality gate, so standing still does not smear your track. FREE, WORLDWIDE, ON DEVICE Works anywhere with GPS, in 16 languages. Free with ads. Your measurements are processed on the phone and are never uploaded by us; the app only fetches map tiles, asks the system geocoder for a readable address, and loads ads through Google AdMob. Readings are for reference only. The go/no-go decision remains yours - check local rules and airspace separately.