How to · Devices

Export the run as a file and open it in Aera. Garmin Connect puts your runs into Apple Health without the GPS route, so there is no line to fly over. The run's file has it. Aera keeps that route on your iPhone next to the run, and Flyover replays it in 3D over the real ground. Needs Aera 4.0 or later.
Garmin Connect writes your runs to Apple Health with their time, distance and heart rate, but not the route. Only the app that saved a workout can add a route to it later, so no other app can put it back in Apple Health.
When you give Aera the run's file, it reads the route from it and keeps it on this iPhone, next to the run Garmin already saved. The map and the replay use it from then on. The route stays on the phone and is left out of backups. There is no account and no upload.
Your whole history at once: in your Garmin account, Data Management, then Export Your Data, tap Request Data Export. Garmin mails you a link to one zip, which can take a few days. Aera reads that zip as it is.
Menu names come from each maker's own help pages and can change with their app versions.
Either way works:
Aera shows what it found before it changes anything. If Apple Health already has the run from Garmin, you see GPS tracks to keep: tap Keep GPS tracks in Aera. If Apple Health doesn't have it, tap Add workouts to Apple Health, and Aera saves the run with its route.
Open the run in Aera and tap Flyover. The camera flies the route over the real ground, with distance, pace and heart rate running underneath. With Premium, you can also save a short upright video of the replay to Photos.
Runs from the last 7 days replay free. Older runs replay with Premium. The replay is only as exact as the GPS that recorded the route. More in the 3D replay.
Aera, for iPhone
Aera reads what your watch puts into Apple Health and holds it against your own normal. Tap a number and the Field Guide shows how it was worked out. Everything stays on your iPhone, with no account. Aera is not a medical device.
No. Garmin Connect doesn't write the route to Apple Health, and Aera has no Garmin account link, so the route comes from a file you export.
FIT, GPX and TCX, zipped or not, and a whole Garmin or Strava export zip.
No. A run counts as already in Apple Health when Health has one at the same time, even under another sport. Aera then only keeps its route.
No. Aera reads it on the phone and keeps the route there, out of backups. There is no account.
No. The import reads the FIT, GPX and TCX formats these makers use, but we have not tried every watch and app version. If a file doesn't open, write to us from the support page.
Related: Garmin data on iPhone, explained · Aera with Garmin, Oura, WHOOP and other trackers · All guides
Free to start. No account. Works with the watch you already wear.