ScopeWizard vs Holler

There are numerous formulas for computing the specifics of your telescope, eyepieces, and camera's characteristics when used together. ScopeWizard brings those formulas together in one handy place. An included database of telescopes, eyepieces, and cameras can be used to mix and match your equipment, or you can enter custom values manually.

Turn your Sonos speakers into a whole-home intercom. THREE WAYS TO BE HEARD • Live — start a continuous microphone connection without holding a button • Message — record a short announcement, then send it • Sounds — play ready-made household, attention, and ambience sounds ONE ROOM OR MANY Choose one room, select several rooms, or reach everywhere. Holler temporarily groups compatible rooms so announcements stay synchronized. LEAVES YOUR SONOS SYSTEM THE WAY IT FOUND IT When an announcement ends, Holler restores each room's previous grouping, playback, and volume whenever the speaker makes that state available. LOCAL AND PRIVATE BY DESIGN Holler works directly with speakers on your Wi-Fi. There is no Holler account, advertising, tracking, or Holler-operated audio relay. Remote broadcasting from outside your reachable home network is not supported. Keep Holler open while using Live. If the app leaves the foreground or the microphone is interrupted, Holler stops the broadcast and restores your Sonos system. TRY EVERYTHING All features are available during the seven-day trial. Afterward, one lifetime purchase unlocks Holler permanently—no subscription. Holler requires compatible Sonos speakers on a network your iPhone or iPad can reach. Sonos S1 and S2 systems remain separate and cannot be grouped together. Holler is an independent app and is not affiliated with, endorsed by, or sponsored by Sonos, Inc. Sonos is a trademark of Sonos, Inc. Included alarm and siren sounds are provided for entertainment and attention-getting use only. Holler is not an emergency warning or life-safety system.