Twixt Time app for iPhone and iPad

4.2 ( 5792 ratings )

Utilities Productivity
Developer: Coldflower Design Corp.

9.99 USD

Current version: 2023.3.2, last update: 6 months ago
First release : 17 Apr 2013
App size: 2.96 Mb

Twixt Time helps track the longterm accuracy of watches and clocks, by collecting & analyzing precisely timed snapshots of their dials.

Use Twixt Time to take a picture of the dial of an analog clock or watch. Each picture captures the exact time displayed on the dial. Twixt also notes the precise instant that the each snapshot was taken, by communicating with highly accurate NTP timeservers on the Internet.

A new snapshot of each timepiece can be added everyday. Using the information from 2 or more snapshots of the same timepiece, Twixt will calculate and show you how precisely the watch or clock is keeping time.

Twixt tracks the most recent rate, overall average rate, and cumulative gain or loss for each timepiece.

Supported dial configurations:

* Hour & minute hands with a central seconds hand
* Hour & minute hands with seconds displayed in a subdial
* Hour & minute hands only

Does Twixt Time work with GMT watches?

Yes. Twixt Time does not need to track the 24 hour hand of GMT watches to measure their precision. It is only necessary to track the hour, minute, and second hands. For GMT watches with central seconds, select the "central seconds" layout. For GMT watches with an offset or subdial seconds hand, select the "subdial seconds" layout. Twixt Time automatically monitors timezone changes based on the timezone setting of the iPhone or iPod touch.

Does Twixt Time work with chronograph watches?

Yes. The chronograph functions of a watch do not need to be measured to track the precision of the watch. Twixt Time tracks the precision of chronographs, as well as watches with other complications, in the exact same way that it tracks the precision of a normal, time-only watch. If the central seconds hand can be stopped and reset with the chronograph function, select the "subdial seconds" layout to track the small seconds hand with Twixt Time. If the central seconds hand continues to move when the chronograph is stopped, but the small seconds hand stops, select the "central seconds" layout to track the central seconds hand with Twixt Time. Most chronographs will use a subdial seconds layout.

Does Twixt Time work with watches that have an offset seconds hand?

Yes. For watches with a second hand that is not concentric with the hour and minute hands, select the "subdial seconds" layout.

Does Twixt Time work with quartz watches and clocks? Or other watches and clocks that are powered by batteries?

Yes. Twixt Time works with battery powered watches and clocks that display the time with an hour, minute, and/or second hand. It does not work with watches or clocks that only display the time digitally.

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Twixt Time is not affiliated with or endorsed by any watch or clock brand. The timepieces shown are for demonstration purposes only.

Pros and cons of Twixt Time app for iPhone and iPad

Twixt Time app good for

The possility to delete a separate time line of one messure of a Watch after Have registered. Very Nice program works fine

...but a much higher price ? I was one of the first users, the new way to mark the hands is a really big improvement and much more precise, but the new price will stop a lot of interested people from buying this software....

After a full service center overhaul of my Omega Seamaster I decided to use Twixt to check the accuracy. Even though my watch had just been serviced Twixt measured that it was gaining just over 6 seconds per day (the threshold for chronometers). I took this info to the service center and they were able to get the gain down to about 1.3 seconds per day. Without Twixt I wouldnt have known my watch was out of spec and would have just accepted poorer accuracy than necessary. The app itself is clean and easy to use. I didnt expect it from just photographs of the watch face but the accuracy is impressive: it matched the Omega service centers measurement exactly.

This app works like a charm. Ive used it on various watches and clocks and it does ALL it says. My go to watch monitor. Well done.

...but no support for 24 hours dials. Update: option to change the name of the watch afterwards would be also great. A name was written wrong and I dont want to delete the measured values just because of that.

Some bad moments

App crashes 9 out 10 times I try to use it. Updating did not solve as well as reinstalling. Questionable Results if you manage to get them :no my watch is not running 2 hours wrong that I can tell... Good idea so I hope things get fixed

This app used to be amazing, however now it crashes every time you try to take a picture. Very disappointed! Get Tooltime instead. Developer seem unwilling to fix it.

Unstable to the point of unusability; clunky design and artificial restrictions on when snapshots can be taken; poor feature set (eg, no way to plot variations over time or review data); overpriced.

You need to map the positions of the hands on separate pictures so it computes the time difference between the watch and the iPhone. Its not a video analysis like it was sound analysis with the other app. Useless and expensive.

As per the Worn and Wound review, its not perfect/done. Right now its not worth it. First, it definitely needs a 10-minute spread for marking noon. Tons of watches dont have minute hash marks, or use numerals instead of an indice at 12. Second, performance is baaaad. It runs very, very slowly - and when youre trying to precisely line up hands and pivots, having a very unresponsive app is not good. Maybe ditch the cute lens effects on the zoom to speed things up, they arent needed. It has potential, but wait until they make it good - and lets hope they put more effort into fixing it than they did Kello.

Unfortunately this piece of software, apart from being complex in using, just doesnt work - time accuracy jumps from -12h to 10mins to +12h on a proper working watches.

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