Worked for me
I have an Oris Titan that I received as a gift around 2005. The watch has been slow (about 6-7 min a month slow) for years. I have sent it for servicing around 2007 (stripped crown) and then complete overhaul in late 2019. I mentioned it being slow each time but continued to be slow after service. I finally decided to open the back and see about adjusting it myself. The first adjustment wasn’t enough, so I adjusted it a second time this weekend Saturday morning, and for the first time ever it’s looking like it might be slightly fast. I have been just comparing it to my phone time daily, but thought it would be nice to check it with this app after reading about it. The watch back was already installed when I got this app later that night. At first it wouldn’t register, so I put the watch with half the case resting on the bottom of the phone with the watch back directly over the phone mic. I also had to put a clear glass mixing bowl over the phone and watch. Once I did that it read and analyzed the watch…+3.6 and then +4 on a second check. This seems to be what I am seeing after a day. Time will tell, but so far it looks like it works well. I have another watch running too fast. If I make any future adjustments to any watch I’ll check it with the app while adjusting.
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Cheaper than a Timegrapher
I have successfully used this app to adjust the rate of several Seiko and Orient automatic watches. The tricks are as follows:
- place the watch crown down on top of the iPhone microphone on your iPhone earphones/microphone. I usually place a rubber band around the watch once the back is off to insure the microphone is tight against the crown. The microphone must touch the glass crown to conduct sound.
- be in a very quiet area
- record the rate over a long period of time such as 15 to 20 minutes because the rate will vary over time.
- it's hard to adjust to 0 so I settle for anything slightly positive such as 0 to +6 seconds fast per day. At this slightly fast crown down rate the watch when worn on my wrist gains a few seconds per day. When the watch is more than 5 seconds ahead of real time I leave it stem up on my dresser for the night. Leaving it stem up, slows down the movement so it loses about 5 seconds over night.
By choosing how many nights I leave the watch stem up versus crown up I can keep the watch within a few seconds of real time.
Note a Timegrapher is a much better tool but runs $150.00 and up.
- place the watch crown down on top of the iPhone microphone on your iPhone earphones/microphone. I usually place a rubber band around the watch once the back is off to insure the microphone is tight against the crown. The microphone must touch the glass crown to conduct sound.
- be in a very quiet area
- record the rate over a long period of time such as 15 to 20 minutes because the rate will vary over time.
- it's hard to adjust to 0 so I settle for anything slightly positive such as 0 to +6 seconds fast per day. At this slightly fast crown down rate the watch when worn on my wrist gains a few seconds per day. When the watch is more than 5 seconds ahead of real time I leave it stem up on my dresser for the night. Leaving it stem up, slows down the movement so it loses about 5 seconds over night.
By choosing how many nights I leave the watch stem up versus crown up I can keep the watch within a few seconds of real time.
Note a Timegrapher is a much better tool but runs $150.00 and up.
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Don’t waste your money.
Unable to get a signal on any watch I tried. Don’t waste your money. There are better apps available.
Rubbish
Tested on Tudor oyster iPhone 5s iOS 12.4 with mic on JBL headphones. Took readings with watch in exactly the same position at 5 minute intervals. App showed full signal strength for each measurement yet result varied widely. Steady reading of 7 seconds per day fast, then 45 seconds, then 61 seconds. Would try to get refund but I’m sure it’s not worth the headache. No contact or feedback details provided within the app. Avoid!
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Works well
I used this with an old speedmaster and it reliably detected the rate and gave a good prediction of the rate over several positions. I used an iPhone X with the supplied headset and microphone, being careful to place the microphone close to the escapement.
