Discussion in 'Other Equipment' started by JAY1, Jan 14, 2013.
Has anyone else used this app by Sten Kaiser? You tennis boffins will love it, it is so accurate....
Very good app worth the money.
Why isn't this available on android?
I would like to know this as well.
I use it to regularly check the stringbed. I usually just use the generic poly for string, so measurement isn't as accurate. Is there an updated list of string factors?
no, this is very accurate.
The developer's argument is that it's better to develop an iphone package because of the differences in hardware with other operating systems.
Have it, pretty accurate in measuring tension loss but not actual tension. Too much work calibrating the correct string.
Or windows phone
This app is amazing and is a great tool for tension management.
I find it's about 12lbs less than what you have your racket strung at....
I had my rackets strung at 51,52 & 53 lbs and it registered at 39,40 & 41 lbs on my racquet tune.
How about you?
If you are using default string factors like most of us then it all depends on the properties of the string.
Using the proper settings it was one lb off - actually it might have been dead on because the racquet was strung at 35 lbs and Racquet Tune measured it at 34 lbs a week later
You racket probably lost more than 1 pound of tension just sitting there but I've never strung that low so who knows.
Very possibly. It was Solinco Tour bite 17 mains and Barb wire 17 crosses. I measured before I hit so I expect it to be even lower now. It's an 18 x 20 stringbed - not sure if that loses tension less quickly
Here is one of his videos before the iphone app (no phone needed) https://www.youtube.com/watch?v=-jXEZdM54GA
Thinking of getting the app for my iPhone, how much was it?
It is about dead on with a constant pull. On my neos it is about 3-4 lbs off of machine tension.
Spot on. Especially if you use it correctly (easy).
How do you add in the properties of a string?
You used it? Seems quite interesting.
I just purchased racquettune around the holidays for my IPad and it was $1.99. Well worth it.
I have used it for quite some time to check the consistency of my stringing and to track the tension history of my string beds after play. It is a very very good app that provides valuable information regarding string tension and related performance.
In the instructions, it tells you how to calculate a custom string factor. I'm more interested in tension loss than actual tension so I don't bother with this. I've got a calibrator to make sure the reference tension is OK.
I've used it quite a bit. My current and previous round of multi testing all have the data included with the reviews. Sometimes I forget to test a string off the stringer or a string breaks before I get a 2nd reading.
If you are always using the same string, it is great for checking consistency.
Can you please explain how to make it spot on?
I'm normally pretty good at things like this, but this is stumping me. Many thanks.
The string diameter and string factor have a lot to do with the accuracy. Like Mikeler said its easier to use as just a reference, and track the tension drop. I did string up one of my frames with DM and used a string diameter / factor that someone put out there for that particular string and it was very close. I think I strung the racquet at 60 lbs, and it read around 58 something.
You need to measure the string factor and use that. To do so you need a stringing machine - do you have one?
There's also a stringlist at the bottom when you add a new string: you can use the values in there to add a custom string.
I love this app. works perfectly with my CP machine.
Sten did say something about teaming up with an Android developer, though he was considering his more popular apps first.
Not sure I'd hold my breath on that one. ;-)
I used it yesterday on my freshly strung babolat PSLs. I strung them with full 17g synth gut(gamma challenger & Wilson stamina). Out of curiosity I decided to string 1@49lbs and 2nd@48lbs.
Racquettune gave me tension of 48.7lbs and 47.8lbs, respectively(taking multiple readings). I was very surprised at the accuracy. By the way I use a klippermate.
Old one I know, but I'd like to add my experiences.
I recently got an Android device and installed the app.
It does work very well enough - occasional crash but it does not lose any data.
I have not tested a freshly strung racquet and will use it to monitor the loss of tension with my 2 full bed gut strung racquets and other various states of stringing I have on-the-go
The developer is quick to point out in the UG / notes, that there will be a variation from the measured tension and the tension the racquet is strung at. Perhaps that is just a get out clause but as others have stated I plan to use it as an absolute measure of loss over time. Not a ref for what I like to set my CP stringing machine at. But the two will converge over time I guess, once I get enough fresh strings measured.
The app I have does not have the history graph, but at least does allow History data.
I found it no problem entering the string data and gauges, creating all the variations I have on some 12 racquets in various states of usage / archiving...
Fun, interesting app.
It's worth switching to iPhone just for this app. :twisted:
The app measures string bed freq. *Hz* (And probably quite accurately.) It would be interesting to see how the freq changes over time and the freq vs. one's personal stringbed stiffness preference.
Seems to me to be quite a leap to make anything more of it.
Freqmess is a free software that pretty much does the same thing. But, you will need Windows to run it. That is what I use at home.
You can download a windows xp or 98 version at stringforum.net by clicking on the download link to the left.
I've noticed that the tension is usually pretty close on my constant pull machine as with Racquet tune. By pretty close I mean ~1 lb or so. I'm guessing that it is the string type being used.
It is definitely a neat app!
It is now on Android.
Yesterday I purchased the Android version.
I tested my 3 Völkl C10s that have been strung with MSV Focus Hex 1.10 at 23/22 kg.
Though the strings are already a few months old and frequently used I still was shocked the tensions have been decreased more than 5 kg. They measured 17,3 kg, 17,2 kg and 16,2 kg (the one I used most).
Your Focus Hex tension loss is in line with what TWU reports.
cool... now Ill have 2 tennis apps!
Nice to hear! So the measurements of the app are pretty accurate.
I tried asking in the classic racquets section but no luck. So here goes in this section
Strung a Slazenger Challenge no.1 woody up at 55lbs.
Put the correct size frame in 65sqin, right strings etc.
I can get a reliable reading but it's consistently 14.5lbs.
Pinging the strings she's def around 50-55lbs compared to my other racquets audible freq.
Other 98 and 93sqin frames I have give reasonable readings. Not bang on as I know they will not be, but good ballpark.
Anyone else experienced this in the woody / Racquettune fraternity?
I think RacquetTune is spot on if you have the correct string factor. I use a calibrated constant pull machine. If I measure it fresh off the stringer, it consistently reads a few pounds high. I think that's because the weave makes the main strings tighter. Remember, you lose about 10-15% in one day with just your racquet laying around.
I tried freqmess on Laptop and that gave similar off results for the 65sqin Woody.
Wonder if the app developers ever really tested these apps on frames like that, but they have the settings...
Occasionally I've come across a string and racquet combination where I can't get any sort of reading. It's not always 'unusual' ones either - I think the last was Gosen OG Micro on a modern frame.
I've never tried racquetTune with a woodie: have you dropped the developer an email? He's a super nice guy, and judging from the contact page on his website will not be completely alien to that era!
Thanks, will def contact the developer. Good idea.
I've done it for Windows phone apps and even helped one pinpoint an annoying error with my detailed fault report - he was so happy he sent me $50.
Getting odd readings
I just learned about this app the other night, so I bought and downloaded it. I was impressed by the reviews. Too often you read about apps that measure something and they are more gimmicky than accurate.
I now own 2 Babolat Pure Drive 2012 racquets. Had
1 for about 6 months, and just bought the 2nd.
The 1st was strung at 54 lbs with Babolat RPM Blast 17g. The app is showing a current tension of 49.1 lbs. To me that sounded pretty accurate. But I have no other way to really tell.
On my new pure drive, I had it string with Babolat XCel (not XCel power) 16g at 54 lbs. I pulled it out of the box 2 days ago (bought and strung by TW). Haven't had a chance to hit it at all. Tonight I tested the tension with the app, and it's reading 39 lbs.
That seems awfully low, but I read other people say it could be low.
I set up the app with the correct racquet dimensions/string pattern. The RPM blast was in their database so it already had the "string factor". However, the app database doesnt have the Babolat Xcel. It only had the XCel power. So I added the XCel power, as well as the generic multifilament setting.
The generic string reported 39 lbs. the XCel power reported 43 lbs. Both seem pretty low for a newly strung racquet compared to what I'm showing on the same racquet with the rpm blast that's been played for 6 months.
So either this new racquet was strung poorly, it lost tension quickly, the string factor is throwing it off in the app, or I should just ignore it and pay attention to the change over time rather than trying to figure out the actual tension.
What do you think?
on mine the default range was set too low making stupid readings. go into settings and check this.
That's interesting. What did you set the range at?
I have taken weekly readings for the last last 3 weeks.
I am getting a slight tension drop off 0.5lb on the gut mains / Mantis Comfort Synth crosses racquet that I use regularly.
The other gut racquet is staying very close to constant and the Mantis Comfort Synth one dropped a couple of pounds at first but now seems to have stabilized.
I have set the lower range to 30 and upper to 65lb.
If I set the lower range above the actual lb of the strings I can't get a reading - common sense that. Otherwise for me it seems to make no difference to the reading setting it lower and lower.
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