Screen Label vs Meridian Elevate

Screen Label lets you add a message to your Lock Screen or Home Screen, quickly and simply. You might want to show some contact details, then if you lose your phone your chances of getting it back go way up. Or a company name, or department name... anything. On iOS 16 and later you can use the Lock Screen widget to add a short message visible on all Lock Screens. For earlier iOS versions you can import any photo in your camera roll, then style and position your message label on top of it. This is saved back to the camera roll as a new picture, and then you can use it as Wallpaper. You can use a plain background rather than a photo if you prefer.

This application performs geometric line-of-sight (LoS) analysis between two elevated structures using a WGS-84 Earth ellipsoid model. It calculates the required Height Above Ellipsoid (HAE) along the straight-line path between two radio masts, accounting for Earth curvature using a mid-chord spherical approximation. Inputs: Mast A base elevation (HAE) and antenna height (AGL) Mast B base elevation (HAE) and antenna height (AGL) Geodesic distance between masts Interpolation position along the path Core computation: Linear interpolation between mast tip heights Earth curvature correction using: d(D − d) / (2Rₑ), where Rₑ = 6,378,137 m (WGS-84) Required HAE at any point along the path Outputs: Required line-of-sight height at selected distance Real-time interactive profile of Earth curvature, ground surface, and LoS chord Visual indication of relative position along the path The model is purely geometric and does not include terrain elevation data or atmospheric refraction. It is intended for engineering estimation of direct geometric visibility between fixed radio infrastructure points.