Guitar Tuner Simple Pro

Review by eFreeware

Tuning between songs is one of those jobs that always seems to arrive at the worst moment. You finish a number, the room is loud, and the phone you would normally reach for is sitting in a bag across the stage or in another room entirely. Guitar Tuner Simple Pro takes that problem seriously: it is built by Anton Plakhotnyk as a tuner for phones, tablets and Chromebooks, with a standalone Wear OS app that runs on the watch itself rather than leaning on a paired handset.

It costs $0.99 as a one-time purchase, carries no ads and offers no in-app purchases, so there is nothing to unlock later. The app has more than 100 installs, a modest figure that fits a paid utility rather than a mass-market freebie, and it was released in July 2024 and updated in May 2026, with Android 17 named in the most recent changes. The pitch here is simple: buy once, tune on whichever device is closest.

A tuner that lives on the watch

The part that separates this from a plain phone tuner is the Wear OS app. It runs entirely on the watch, with no phone connection required, and uses the watch microphone to pick up the string. The reading appears as a needle on the watch face, and the layout is designed for both round and square watch displays.

That combination matters more than it might sound. A tuner that depends on a phone is only as handy as the phone's location; one that lives on the wrist is available the moment you need it. The app is meant for quick tuning in the middle of a set, a lesson, or wherever a phone is not at hand. I would expect the wrist version to appeal most to players who already wear a smartwatch and dislike digging a handset out mid-session.

The watch microphone is doing the listening here, which is the natural approach for a standalone app. Anyone who has used a watch-based tuner will know that bringing the instrument close to the wrist is part of the routine, and that is a reasonable trade for not carrying anything else.

The phone, tablet and Chromebook side

Away from the watch, the app covers the larger screens too. It lists support for phones, tablets and Chromebooks, and the interface is described as the same clean, no-setup design as the free version, with a large analog-style needle meter as the main readout. The developer cites a pitch detection resolution of 0.03 Hz, a figure that speaks to how finely the app resolves a tone rather than to any particular instrument.

The needle meter is a familiar choice for anyone who has tuned by eye before: you watch the pointer settle as the pitch comes into range. A large meter on a tablet or Chromebook is a sensible fit for a music room or a teaching space, where the screen can sit on a stand within easy view.

Because the app is bought once and tied to your Google account, the same purchase covers the devices you sign into. That is a neat arrangement for a household or a teacher who moves between a phone, a tablet and a Chromebook without wanting to pay again on each one.

Not just a guitar

The name undersells the range a little. According to the developer, the app tunes anything with a steady pitch, and the list includes guitar, bass, ukulele, mandolin, violin, brass, wind instruments and voice. Standard guitar tuning is one job among several rather than the whole point of the app.

That breadth is the most interesting thing about it for me. A player who keeps a ukulele on the couch and a violin in a case gets one tool for both, and a teacher working with wind or brass students has the same needle meter to point at. Voice is included in that list as well, which suggests the app can serve as a general pitch reference rather than a string-only device.

The free sibling app, Guitar Tuner Simple, covers the phone side at no cost. The paid version exists for the standalone Wear OS app and for the convenience of having the whole set in one purchase, which is a clear split for anyone deciding between the two.

What it asks of you

The $0.99 is a one-time cost rather than a subscription, which suits a utility you might open for thirty seconds at a time.

The scope is deliberately narrow. This is a tuner, not a practice suite, a metronome or a recording tool, and it makes no claims beyond tuning. The needle meter and the pitch detection figure are the whole story of the interface, which is fine for a job that benefits from being quick and uncluttered.

There is also the practical matter of how a watch tuner is used: the watch microphone has to hear the instrument, so the wrist needs to be near the sound.

Who it fits

The clearest fit is a player who already wears a Wear OS watch and wants tuning to be a wrist-level action. Gigging musicians, students in lessons and anyone who practices away from a phone stand to gain the most from the standalone app, since that is the feature the purchase is really about.

The second group is players who tune more than a guitar. With bass, ukulele, mandolin, violin, brass, wind and voice all named, the app earns its keep for multi-instrument households and for teachers who need one reliable reference across a room full of different instruments.

If you only ever tune a guitar at home with your phone within reach, the free version covers that ground, and the paid app's value rests on the watch side and the wider instrument list. That is a straightforward choice rather than a hidden one, and the one-time price keeps it low-stakes either way.

A small, focused purchase

Guitar Tuner Simple Pro is a narrow tool done in a specific way, and the price reflects that. The developer's claim of 0.03 Hz pitch detection resolution and the analog needle meter describe a simple, readable instrument rather than a feature-packed one.

I would point Wear OS owners and multi-instrument players toward it first, since those are the people who get the most from what it does. Anyone tuning a single guitar next to a phone can start with the free version and decide later whether the watch app is worth the small one-time cost.

What's new

Android 17