By Jinfei Sun

  • Category: Utilities
  • Release Date: 2015-03-30
  • Current Version: 2.0.0
  • Adult Rating: 4+
  • File Size: 7.33 MB
  • Developer: Jinfei Sun
  • Compatibility: Requires iOS 8.0 or later.
  • App Ratings:
    4/5 ( 34 App Reviews)
  • Price:
Hairspring App Ratings: 4
Based on 34 App Reviews

Hairspring App Details

Hairspring turns your device into a powerful mechanical watch timing machine. It measures the precision of mechanical watches, with an accuracy of at lease ±1s/day, by analyzing the tick-tock sound using the microphone of the device. It supports a wide range of frequencies, covering almost all mechanical watches available on the market: - 14,400 VPH - 16,200 VPH - 18,000 VPH - 19,800 VPH - 21,600 VPH - 23,400 VPH - 25,200 VPH - 28,800 VPH - 36,000 VPH In case you don't know your watch's frequency, you may use frequency auto detect. The measuring time can be set from 30 seconds to 3 minutes, to get a balance between response time and accuracy. An oscilloscope shows the audio waveform in real time. It's quite handy for monitoring the status and diagnosing some common problems. The result is plotted in a chart, which can be saved for later reference. Also, it can record and save a long-time measurement, e.g. for 12 hours, to analyze the long-time performance of the watch. To use Hairspring, just place the microphone tightly close to the watch back, then set the parameters. After collecting enough data, the result will be shown. A detailed usage guide can be found here:


Hairspring App Screenshots

App Reviews

  • Cool App

    By W@kaMan
    Works for me first time, no problems. This is a very useful app for watch aficionados.
  • Great app for general purpose time graphing

    By Scottf29
    I very much appreciate this app. This app has helped me get my collection of Seiko 5’s and a Seiko JDM (SARB035) all to within the specs (between 0 and +10 seconds per day) I think it would be fair to say that this is no replacement for a real timegrapher. However if you’re like me and want to make minor adjustments in the regulation of your mechanical watch—this is an invaluable tool.
  • Does not work.

    By Bobbycmusic
    This app does not work. It will either say no signal detected when it graph shows it is. Sometimes, it will say data is being collected but never goes completely through. It’s only $5 bucks but I’d ask for a refund if you end up buying it. Just save yourself the $5.
  • Extremely Helpful!

    By arswaim
    This app is extremely helpful. Despite having no experience with such things I was able to adjust a fast-running wristwatch in just a few minutes instead of several rounds of adjusting and waiting. Definitely worth the very modest cost.
  • Great app

    By Jeanlorent
    As a beginner this app allowed me to adjust my Invicta which was too slow. Now it is slightly fast at average +3.5s/d over 8 days which I consider outstanding for a sub $100 automatic. As a reminder Rolex COSC were -3/+5 s/d and they revised it recently to -2/+2. Initially I worried that the iPhone ear bud microphone might not be sensitive enough as when I was placing it on the watch and run “Voice Memos” native iPhone app I could not detect a beat. But Hairspring app appears to increase sensitivity and filter very well for the beat. All I do is to attach the mic with piece of tape to the watch glass while I adjust the regulator with a plastic tooth pick to not risk any magnétisation. Wonderful app and so much fun!!!
  • I achieved +-1.5sec accuracy with this App!

    By Excursioner
    I'm a new owner of a 46mm Hamilton Khaki Pilot that was loosing 12 seconds per day. After checking a YouTube tutorial on calibrating this type of watches I used this App to get realtime measurements of the watch beat while making micro adjustments. Every small turn on the speed screw needed a soft shake and about 5 minutes in the watch to get a stable lecture again. I achieved to get +-1.5 seconds of accuracy in the beat. It's been 24 hours since I synced the watch with the atomic time and there are no lost or gained seconds. Incredible! It is very important to use the mic on your Apple Earbuds, just some 5" or more separated from your iPhone so there's no risk of getting your watch magnetized, which will give you an irregular beat. And while making the ticking lecture avoid voices or any other sound, it will interfere with the results. Also crucial to adjust to the correct frequency in the settings section (in my case was 28800 VPH for my watch). The App was unable to auto detect it correctly, it kept showing 14400 instead of 28800. And a thing I found is that the lectures where different if the watch was facing down or up. So I did the adjustment facing down, then turning it up to make the beat lecture. The only con I found is that sometimes the App wouldn't recognize the mic source. I just force closing the App, waited half a minute and opened it again.
  • Works and easy

    By Joseph Rhodes
    It works just fine using an iPhone headphone mic placed under the watch and smashed between 2 pillows. Once it picks up the info, the graph starts going. Does exactly what I wanted it to do, check how much time loss/gain on my various mechanical and automatic watches. I like that it stores the graph as well as info. I wouldn't recommend using this without covering the watch and mic between two pillows, because any outside noise that could be misheard to the mic as a tick, will throw off your readings.
  • Cant believe it works so well!

    By The original joshpod
    I bought it hoping it did what it claims. It preforms wonderfully! It doesnt seem to be as sensitive as some people say but if you have loud animals or kids its good to get them somewhere else for a bit while using it. Took my Seiko that i messed with from being 5 seconds off per 12 hours to near perfect time! Super happy with this app. I use it on my ipad mini and open the back of the watch and set the top of the ipad where the mic is right ontop of the watch. Gets great readings
  • Works Great, Hats Off!

    By Fly'NBrian
    As a watchmaker I have an expensive watch timing machine. However , I travel and can't bring it with me. This application is a great portable unit for checking and adjusting Mechanical watches. I've adjusted multiple vintage 18000 beat watches along with higher beat ETA based watches like Omega and Tag Heuer. I found the application works best in a very quiet room using the iPhone headset bud microphone. It does take a little finesse but it does work correctly. Watchmaking isn't necessarily for everybody but this application brings it closer. Hats off job well done!
  • Works great

    By Seiko guy
    Wish I had more mechanical watches to test and time. Very cool app.