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 721 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)



  • All Of These Positive Reviews Are Accurate.

    By Osoberry
    This iStroboSoft tuner was the first paid app I installed on my first iPhone back in 2009 after learning about it via a very talented music producer who was the engineer at Dub Narcotic Studio in Olympia Washington. He used the iStrobosoft tuner to tune all of the instruments we used on some recording sessions there, all the while heaping praises on this supposedly incredibly accurate strobe tuner he had on his iPhone. At the time, the concept of professional quality studio gear on a phone was foreign to me, and a fairly new concept in general. Honestly back then the whole concept of apps on phones, let alone paying 10 bucks for an app on a phone, was a new concept in general. But after a week of working with my friend in the studio and witnessing the accuracy of the iStrobosoft tuner - as well as enjoying its beautiful interface - downloading and paying for this app was the first thing I did when I got my first iPhone a few weeks later. I have used it exclusively ever since, and it has been worth every penny. Peterson makes some of the best strobe tuners out there, and the price on such hardware can run in the thousands of dollars, so having access to that same Peterson quality in an affordable iPhone app is priceless!
  • Great but drains battery fast

    By FasterThanILook
    Great tuner app - I depend on this as a pro musician. Wish I didn’t have to force-quit after using, but it drains my iPhone 6S battery FAST if I don’t.
  • Handy

    By jonnyrocket1486
    Works very well!
  • Update for newest devices

    By jedharp5991
    Fantastic app, but the display and full use of the newest devices isn’t supported yet
  • Guitar hobbyist

    By 66613187
    Peterson is the best, Love the Sweetened tunings for my acoustic guitar. However, I have to use GuitarTuna first before IStroboSoft can recognize the note or string correctly , then fine tune the guitar. This is especially true with cheaper guitars . “Peterson” please make an easy mode for the standard tuning we use 90% of the time. E A D G B E mode for a six string guitar only, all other notes are just off at this point.
  • No other tuner makes me hate myself this much.

    By imunimaginative
    5/5, would buy again.
  • Not updated for X/XS/XR displays

    By Georgie010
    For an app that costs quite a bit more than the average mobile app (not including in-app purchases), there is no excuse for it to not be updated for the X/XS/XR displays 1.5 years after the X was released. Especially when updating apps for the newer displays does not take a lot of work.
  • Useless

    By mgr123456
    Worst tuner ever. Don’t waste your money.
  • Great tuner. More sensitive that I ever thought a tuner could be

    By Billy Joe Carl Bob Danny Frank
    This is a killer tuner. Super sensitive have to use it with the noise filter on or it tries to tune everything in the room. Spent 9.99 and was not disappointed.
  • 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!!