Clock Wave

• Price: $1.99

Last verified 31 Jul 2026

4.7 247 ratings · App Store

1. 5/5Works but can take some time to find the best setup.

   Can confirm works on a Citizen AT6080. If you have trouble - I think the signal transmission is from the coupling of the coils in the speakers to the receiver in the watch, rather than the sound. So just because you can hear the noise, doesn’t mean your watch is properly aligned. I have a Citizen AT6080 and just aligning it with my iPhone speakers doesn’t work. I had to take a pair of over the ear headphones and put the case between the two speakers (facing the speaker coils). It takes 10 mins or so to work but is able to consistently update.

   C-Southard · 31 Jul 2026

2. 5/5It really WORKS!!!! This one, not the free one

   CLOCK WAVE is the one to get. Worth the 2 bucks. First attempt it worked perfectly with Casio 5161 moduled watch 12 o’clock positioned next to iPhone speaker. I tried the other app that was free but had a paid upgrade and I tried it a 100 different ways with iPhone speaker, Bluetooth speaker, headphones over an hour I wasted and it never worked. Get this one. It worked first try in a medium noisy public environment. I want to send them an extra $2 as a tip because this actually works without wasting any time. My thanks to the developer.

   Just a Bus Driver · 31 Jul 2026

3. 5/5Freaking Amazing App! You are my hero!

   Just bought a watch from eBay and was having trouble receiving the time signal with it. Loved the watch but not sure if there was a problem with the receiver. No way to test but to go outside at night away from the house, point north, etc., etc. Even a watch I already owned and knew worked with the signal was having trouble. Heard about JJY app on a google review of a similar watch and then hit the App Store for it, and took a guess to search for WWVB. Found this app! Less than ten minutes later, watch synchronized! Fabulous, and best $2 that I ever spent.

   Cover Your Assets · 31 Jul 2026

4. 5/5Converted skeptic

   I was doubtful of how clicking sounds from a speaker would simulate radio signals but bought the app anyway. I tried the app with a Lacrosse atomic clock that can’t receive a WWVB signal unless it was by a west facing window. It didn’t work so I was all set to give a 1 star scam rating and review. I decided to try it again but this time I aligned the speaker with the back of the clock and turned up the iPad volume. When I looked five minutes later the signal received icon was showing on the clock and it was synchronized with the correct time, having been 12 seconds slow before. Now I have to find how why and how this works

   papachungo13 · 31 Jul 2026

5. 5/5How it works...

   I have seen a lot of folks saying this cannot work. The app generates a sound signal but a radio controlled watch needs a radio signal to calibrate. It is not the sound that is doing it but the electric square wave pulses in the wiring to the speaker that generate the electromagnetic pulses. There is a triple harmonic at 20kHz that generates the 60 kHz radio signal that your watch can recognize. If you plug a simple AM antenna into the speaker port of the phone it will work even better. (One wire to ground and one to left or right) Then all of the electrical energy goes to EM instead of wasting it to drive the speaker ;)

   MAWilsonPE · 31 Jul 2026

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