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: Requires iOS 8.1 or later.
Score: 4.5
From 672 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)



  • My guitar has never been in tune before today

    By zippppy123
    I’ve been tuning with harmonics for 40 years. Then I saw a video on YouTube showing clearly that harmonics are not correct, at least the fifth and seventh fret. I used this Peterson tuner to set my bridge intonation and tune my guitar and now it plays like a completely different instrument, this is a guitar I’ve been playing for 30 years. I feel like an idiot.
  • Update for the HD version?

    By Rich1965Awesome
    Are you planning an update for the HD version?
  • Luthier’s Review

    By colinsk
    I have been a luthier for 30 years and have been using my Stroboconn for that long. I wanted something equivalent and portable. I wrote my first spectrum analyzer (FFT) for hardware I made in 1984 running on a Mac+. I have a lot of expectations when it comes to this software. With in app purchases I had to spend $30 to replace the mechanical strobe which seems expensive for an app. It does, however, function very well. Make sure to calibrate it. I also spent an extra $10 for having the spectrum features replacing my Mac+. (Well worth it.) I would really like a power meter feature. Beyond tuning I often need to measure string to string balance in piezo pickups. The other feature I would love to have is a waterfall display of the spectrum. It would be an easy add.
  • The. Best. App. Ever.

    By Baseman121
    I have pedal tuners on my big and small boards. They are the ok but was frustrated that often had trouble dialing in-tune that pleases the ear despite what the dial says. Discovered this app and ten minutes later tuning nirvana and discovered one guitar needs a serious set up. Easy to use and so accurate. Best $10 spent ever. Just get it!
  • I use it to intonate my guitars.

    By omgbruce
    This app is the best tuner I’ve ever used! The strobe interface is what makes this tuner easier to use compared to my other ones. Yes, it is very accurate and sensitive just like how they claim. I was unsure about it because I didn’t have an interface, so I’m just using my phone’s onboard mic. Everything works with the built in mics, and you get the option on boosting the signal with some type of noise reduction option. The only downside for me is not being able to directly plug into the tuner, but that is just my own fault. I highly recommend this app!
  • Love it, but...

    By Jdddj8383838
    Veteran band director and orchestral musician here. This is a great tuner. I find it very accurate and reliable. Put it up side-by-side next to my Peterson strobe tuner and they match perfectly. The $10 price is a bargain! HOWEVER, the app throws adds up over the app preventing you from using it once in a while. Why? I already paid for the app. Get rid of the adds, please.
  • The best

    By sorbett
    The best iPhone tuner app, by far.
  • Great app and very accurate tuning

    By CodeTitan
    I use this app for setting the intonation on my guitars every time I do a setup. Its a very accurate tuner and very handy to have on my phone and tablet. Highly recommended.
  • Being in tune is worth way more than $10.

    By ProfessorX81
    It is a steal, even at $10. This app is a successful implementation of Peterson's virtual strobe proprietary technology. The application compares very favorably with my original 490 and my StroboStomp 2. I am a professional musician and stringed instrument tech, and even though I can tune to within 5 cents by ear, this is an invaluable tool to constantly have in my pocket. To the reviewer that defiled the ratings out of ignorance because it's "IOS 11 only" - if you have a legacy device, as I do, the workaround is to buy the application through iTunes on a computer, then "get" from the App Store on your device. To the others who removed a star because it doesn't have a pitch pipe or metronome - where in the description does it claim these features? This is a tuner, and a damned good one. A used replacement for my StroboStomp would be $70. Many naysayers here probably have a $100+ Boss TU-2 on their pedal board (it is crap, has no pitch pipe or metronome, and employs LEDs to get guitarists vaguely close, yet nobody's whining to Roland) Sorry to bristle at ignorant reviewers, but they detract from the quality of this tool. Get it, and tune up already!
  • Good

    By jendkngfid dj
    The icon for the app is black and white but i cant make the tuner black and white. I thin im just being nitpicky though