By Peterson Tuners

  • Category: Music
  • Release Date: 2009-03-31
  • Current Version: 2.98
  • Adult Rating: 4+
  • File Size: 7.01 MB
  • Developer: Peterson Tuners
  • Compatibility: Android, iOS 8.1
Score: 4.5
From 706 Ratings


Usage questions? ***Please contact us before posting an issue in the reviews.*** Peterson Support at or call 708.388.3311 M-F 8am-5pm (CST) TRUSTED BY PROFESSIONALS FOR OVER 70 YEARS. ---iStroboSoft for iOS--- Peterson Strobe Tuners' popular StroboSoft tuning application for the iPod touch® and iPhone™. iStroboSoft™ offers the unmatched accuracy of a mechanical strobe tuner for the highest degree of precision available in a software tuning application. Plug in and tune your electrics and acoustics quickly and easily with 1/10th cent accuracy. Peterson Tuners has offered tuning solutions for over 65 years and is the only company specializing in hardware and software tuning products for all levels of musicians. FEATURES: • Stand-by mode to reduce battery usage or freeze the display. • Guided Mode Tuning offers an alternate strobe display that slows the strobe bands one-by-one as you come closer to tune. • Speed control for strobe display; dampen the response for a longer note display. • 12 Temperaments with adjustable root control. • Display all sharps note display. • Assisted Low Note Detection (ALND) helps capture very low frequencies. • Mains hum filter option reduces the chances of the tuner latching on to 50 or 60Hz cycle hum when using a direct line-in connection or while using the app during device charging. • Smooth, real-time strobe display allows you to achieve an unmatched level of accuracy. • Note/Octave window displays the correct note and octave for the note being tuned. • Cents display allows you to see how far out of tune your note is in cent values. • Tune in auto or manual mode. • Toggle the display to show: cents, Hz, MIDI note value for the note being tuned. • Glowing flat/sharp indicators assist when tuning a note very far from the target position. • Noise filter: Use the noise filter when utilizing an external mic or clip-on tuning device to help reduce the effect of extraneous environmental noise during tuning. • Input boost: The input boost will raise all input frequencies by +24dB. • Calibration mode: iStroboSoft can be calibrated to an external source guaranteeing 1/10th cent accuracy. • Drop/Capo mode: iStroboSoft will auto-transpose notes up or down to one full octave. • Adjustable Concert A: Change the Concert A reference of the tuner to accommodate tuning to a fixed instrument, such as a piano, or tune instruments that do not utilize the typical Western A440 reference. • Full screen mode permits the strobe display to be maximized on screen to allow better viewing from a distance. • Change strobe display colors to accommodate different lighting environments or set a preferred user color for those with limited color palette recognition. Use the built-in mic on your device for tuning or connect directly via the headphone jack using an approved adaptor cable or interface. Devices without a headphone jack can connect a pickup or mic using the lightning-to-audio adaptor. Optional adaptor cable for direct line-in access as well as mini capsule microphone available from Peterson. Support via email at: or call 708.388.3311 M-F 8am-5pm (CST)



  • Amazing Value

    By Lowellipop
    Buy the app, buy the Peterson adaptor cable for your iPhone, you have a strobe tuner for under $25. Amazing value and worlds better than the boss tuner I was using before and my guitars really come alive after tuning up with this degree of accuracy. Once you use this you’ll see what you were missing if you’ve never used a strobe tuner before. Unbelievable value, don’t think I’ve written a review for an app before but this is just outstanding!!
  • The best!

    By jay dog 28
    I absolutely love this tuner, the most accurate available. Other tuners get you in the ballpark, this is dead on. Worth the money, amazing piece of technology, a pleasure to use.
  • Works but...

    By jimmyteal
    I remember my 8th grade orchestra teacher used to tune us 1 by 1 with a physical tuner just like this one so I was excited to see that this now exists for my iPhone! BUT..... I had to pay extra for the functionality to tune each violin string / had to download a sweetener. And After I dropped $15 i still don’t get all of the advertised features, plus the app isn’t optimized for iPhone X. So I that’s why I have a 2 star review. Thanks
  • Simply the best

    By John banger
    If you need a tuner You won’t be sorry
  • Nice tuner to have in my pocket

    By cf67polv5
    Wanted a tuner to set intonation. Did it by ear and was pretty close. But was still off a bit and wasn’t happy. (Guitars need a well tempered tuning.) The iStroboSoft with guitar sweetener showed me where I was off and needed to be, within 1cent. Also a great tool to have when trying out a new guitar. Tuner fits nicely in the pocket. I find that the room needs to be really quiet to do it right. For $16 with the sweetener it’s pretty good. Thanks for reading my review. Update: I found that setting the intonation with the sweetener on actually made the intonation come out wrong. I couldn’t find a way to shut it off so I set the intonation with my old boss tuner, then open tuned with the strobe sweetener on. That works much better.
  • Simply the best.

    By spupilup
    This tuner is incredible. It has helped me set the intonation on all 5 of my guitars with a degree of accuracy I could have never imagined. And for $10. It’s a no brained. Buy the app, you won’t regret it. I recommend the guitar tuning sweetener as well. Finally, if you want this tuner to preform like it’s in a lab spring for the adapter cable. You can plug your guitar directly into the phone (gotta use that stupid dongle) and it will take all the extraneous noise out of the act of tuning your guitar. Along with the money spent on the app, the $13 for the adapter was money well spent. I don’t care how good your sense of pitch is, this app, especially with the the adapter, is simply better.
  • Really great tool

    By TCrawf3
    I looked into and tried clip on tuners like the Snark. It worked well but I saw reviews that suggested some finishes were marred by the clip on over time. I saw the Peterson website and pondered on which tuner would work best for me with classical and steel string guitars. Then I saw the iStroboSoft tuner. Fascinated, I purchased and used the tuner with my iPhone and iPad. It has become my tuner of choice. I really like how it handles the job of fine tuning my guitars. I tried the sweeteners but finally I settled on the normal setting and use the “cents” setting. I find on most of my guitars the intonation on the third string is a bit finicky . If you just recognize this, you can kind of view the tuning bars and cent values to create your own “ visual” sweetener values. Bottom line- get it if you are in a quiet setting to use it. I actually think there is a clip for this that allows tuning in noisy environments? For me, I like playing at the end of day when all is peaceful and quiet. This tuner is the first step in practicing every day. Great software!!! Great app- period.
  • Great buy!

    By Cotmbarry
    Ten bucks for a great tuner!
  • Great tuner

    By BassPilotDave
    I bought this tuner primarily for intonation my instruments. I also bought the jack to plug a 1/4” instrument cable into. The large display on my iPad is perfect for the bench and makes dialing in tuning easy. I also tune with the iPad mic when practicing (no other instruments interfering with the input).
  • Yes, it’s worth every penny.

    By M. S. N.
    I used to use iStroboSoft back in the day on my iPhone 3G when I played a beat-up, bootleg Strat — pleasantly surprised to run into it on the AppStore today and glad to see it’s just as good as it was then. Better than the other tuners on the AppStore (I’ve tried them all). Absolutely worth ten bucks: your guitar - and the ears of your listeners - will thank you.