Open it and know
Direct, pre-shadow, retrograde, or post-shadow, with the next meaningful date and a plain-language planning cue.
Tracking Mercury
Before the message, check Mercury.
Retrograde is the small iPhone app that keeps Mercury retrograde, shadow windows, and timing alerts close at hand, so you can plan the conversation, launch, trip, contract, or repair before the static starts.
One-time purchase planned at $4.99. No account. No subscription.
Today
Mercury weather
Retrograde in progress
23 days
Check tone, timing, details
Why it exists
Most astrology apps want to explain your whole life. This one answers one question quickly.
Is Mercury retrograde, close to retrograde, or safely direct? Retrograde turns that answer into a clear planning signal, then gets out of your way.
Inside the app
Built for the moments people actually ask about Mercury.
Plan around windows
Month and year views make it easy to spot sensitive windows before scheduling launches, travel, repairs, or big conversations.
Use reminders sparingly
Get a nudge before retrograde starts, when it ends, or during the period at the cadence you choose.
Trust layer
Quiet software, serious ephemeris work.
Retrograde bundles a Mercury event table generated from NASA/JPL Horizons data. The app does not need an account, does not track you, and does not call home to tell you what phase Mercury is in.
1900-2100
Bundled Mercury coverage
Station and shadow windows are included in the app bundle. Calendar export asks for write-only permission only when you choose to add a window.