I'm shocked at the beat error of the SKX007. I wonder if it is something about the movement that it can't pick up, the movement having an issue, or if it is demonstrating the limits of using the app.

 

Its quite possibly just app inconsistency although I ran it on the 007 around 10 times and it still showed that 4ms error. I'm now thinking there might be something wrong with the balance wheel.

 

4R Seikos have loose accuracy tolerances, but not that loose.

 

Yea, I was quite surprised by this. I was expecting it to be off by a bit, but not -74s. I'm tempted to adjust it myself to see if I can improve it.

 

From one hobbies to another, it would be more beneficial to you if you measure the same watch in 6 different positions, and try to understand the spread of time keeping across the positions.

If for example you have a watch that runs +20 dial up, +20 dial down, +10 with 3,6,9,12 up, you can regulate the movement such that you are at +6 for dial up/down and -4 for 3, 6, 9 ,12 up.

Accuracy in a single position is all fun and well, but unless every position gives you a similar readout, you don't actually know how the watch is performing.

 

Agreed! I'll set that up soon and what results I get. I just did a quick test with these as I was just messing around with the app. It would definitely be interesting expand this dataset.

 

I have that app as well, with weird quirks :
It doesn't like to read an Nh35, I have to try multiple times.
It reads the 7s26 in my snxs no problem and it shows the same beat error of 4 ms, and accuracy of +17
It reads the movement in my Kamasu better than the nh35 but still it doesn't do it all the time like the 7s26.

 

I have that app as well, with weird quirks :
It doesn't like to read an Nh35, I have to try multiple times.
It reads the 7s26 in my snxs no problem and it shows the same beat error of 4 ms, and accuracy of +17
It reads the movement in my Kamasu better than the nh35 but still it doesn't do it all the time like the 7s26.

I did the tests with the case back off which seems to help the app get consistent readings, but I do agree there is some margin of error with the app reading different movements.

 

Way cool.

 

I did another quick test on the 4R36 in the other 5 positions. It looks like it definitely needs to be regulated, at the least. It is also interesting that the spd rate and the beat errors are relatively consistent with certain positions.

 

My NH34 was unregulated but it looks like this afer regulation

 

Over 75 spd of posture variance is pretty poor. I'll wager it has low amplitude. My 6R had similarly poor position variance before I sent it to the watchmaker. Amplitude was barely over 200 dial vertical and under 200 dial vertical.

 

Agreed on the low amplitude. I cant wait to get it on a timegrapher and see how low it really is. Hopefully its just the dodgy factory lubrication you mentioned which should be a simple enough fix.

Edit: Then again, it makes me wonder what other parts need proper lubrication. Its kind of disappointing to have to service a 1 year old 'Limited Edition' watch.

 

I've been using that app for a couple of years and find it's results fairly accurate and consistent. There's another Android freebie that works pretty well called "Clock Tuner". Those results jive with WAM, lending credibility to both apps, and I find all of the results are borne out by daily wear. They work.

 

Very interesting. I might have to download it and give it a try.

 

Welp, I just downloaded it and tried it out on the watch I am currently wearing (Detroit Watch Company's 1701 Pontchartrain). It has a Swiss Eta 2893-2 GMT and it about a year old. It came in at -1s and 0.1ms error. I might have to play with a few more when I get home.

 

Love this app, at least for the price. I am surprised by the positional variance of my SW200 watch, about 7 seconds difference in positions.
I cannot get the app to work on my Miyota 9010 Citizen.

 

Just tried with four of ours. Makes for pretty grim reading!!! The best was the Mrs Tudor 1926. My Black bay came 3rd behind an Invicta....

 

 

View attachment 16695647 View attachment 16695647

I've yet to use the compare function in the app. Were the watches fully wound? I found that fully winding the watch before taking readings seemed to make the results decently accurate.

 

Just tested the Rolex Explorer I (214270) currently on my wrist:

 

You might want to use another detection setting in the options

Typos courtesy of Samsung Auto-Incorrect[emoji769]

 

I messed around with those settings, but the auto bph and high sensitivity seemed to produce the most consistent results for me. I think it might just depend on the environment it's being used it, yet another variable 🙂

 

Goes a little crazy with my Omegas. It probably will laugh hard, cry and then die measuring a Grand Seiko.

 

Thanks 👍 I tired it a couple of months ago and had difficulty isolating background noise, where do you place your watch?

 

I took readings in a relatively quiet room on my desk, and I had the casebacks off which seemed to definitely help the app pick up the sounds much better. I've also noticed that placing the mic right over the part where the balance wheel is located works well (if you can't get the caseback off).

 

Definitely interesting, thanks for sharing!

 

I'll be downloading this thank you

 

I've been contemplating buying a meter so this is perfect timing

 

I'd still get a timegrapher, as the app doesn't calculate amplitude. I also think a timegrapher would be a lot more accurate, but this app is a good go-between till I get one. Just my 2c. 🙂

 

Just downloaded this app and I'm impressed. Measured my Steinhart, Yema Superman GMT, Bulova, Sugess and Vostok watches. My Vostok was a shocker but no surprise there. The other watches were really accurate with my Sugess Mechanical Chronograph being one of the best. The ETA movements in my Steinhart and Yema were also really good.
Great fun to see how good my watches are, Vostok excepted, at telling the time with a high degree of accuracy.

 

Just downloaded this app and I'm impressed. Measured my Steinhart, Yema Superman GMT, Bulova, Sugess and Vostok watches. My Vostok was a shocker but no surprise there. The other watches were really accurate with my Sugess Mechanical Chronograph being one of the best. The ETA movements in my Steinhart and Yema were also really good.
Great fun to see how good my watches are, Vostok excepted, at telling the time with a high degree of accuracy.

 

I use it and like it. It has been helpful in deciding what position to leave a watch in overnight depending on whether it runs fast or slow on your wrist. If it runs slow during the day you can leave it in the position where it runs fastest, and vice versa.

However, I have found that measures in different positions don't quite add up to the way the watch actually wears on the wrist and the measurements can vary considerably depending on how much power is in the mainspring.

Sent from my Pixel 6 using Tapatalk

 

Do any of you worry a little bit that the speaker in your phone has a magnet? I guess the time it takes to make the measurement might not be long enough to have an effect?

 

You know it didn't even cross my mind! Thanks for pointing that out. There are multiple neodymium magnets in smartphones for the speaker, taptic feedback motor, vibration motor etc, which could potentially affect the readings, but they don't seem to have magnetized the watches I ran the app on ( did the compass test). So either they are well insulated (caseback on or measure through crystal side) or exposure time is not long enough to magnetize the movement like you mentioned.

Probably best to put them on a degausser afterwards though, although it does cast further doubt on the accuracy of the readings. I don't think it would skew the readings significantly though.

 

FWIW, I tried running that same app on my android to check a 4R36 Seiko and the results were very erratic (inconsistently so in regards to how the watch ran).

 

I would have to agree. I think it's OK as a base test and a bit of fun, but I wouldn't take it too seriously. I prefer to just check my watches against an atomic clock app.