“One of the worst tuners out there! — This app doesn’t even respond to inputs. The needle appears frozen to one spot most of the time. I wouldn’t recommend this app for free users. For free users they will also make you watch a 30sec or…”
Independent automated assessment · 3 signal sources · 501 reviews scanned · analyzed 2026-10-04.
4.6 ★45,924 ratings
—Downloads
4+Age rating
284 MBApp size
Free · In-app purchasesIn-app purchases
About this app
CoachTuner is a FREE chromatic instrument tuner that allows you to quickly tune your guitar, bass and ukulele using the built-in mic of your iPhone/iPad/iPod. CoachTuner can tune acoustic or electric guitar, bass, ukulele. It's easy to use for beginners and it's Free.
*** How to use CoachTuner ? *** The open strings of a guitar from the thickest to thinest are as follows:
E – the thickest or lowest sounding string is known as the 6th string A – is the 5th D – is the 4th G – is the 3rd B – is the 2nd E – the thinest or highest is the 1st…
Preview
Real screenshots from the store listing.
Independent evidence report
The evidence behind this assessment
This is where the page changes from an app-store listing into an evidence report: findings, important reviews, pricing and a dated history.
Which version this describes
When we ran this analysis, and what the store lists now.
This analysis describes version 4.1.2 of the app, analyzed 2026-10-04 . The app may have changed since.
The store currently lists version 4.1.3, updated 2026-10-01.
The app has been updated since this analysis. The findings on this page describe version 4.1.2, not the version now listed on the store.
Release notes for the newer versions, in the developer’s own words:
Version 4.1.3 · 2026-10-01
- Less intrusive opening ad: fewer interruptions when returning to the app - Rewarded ads now preload for a smoother, faster experience - Improved crash reporting to help us fix issues faster - Fixed several chord name translations
What we measured
Each line is a measurement published as a measurement, never a verdict.
Each line is a measurement, published as a measurement. Where we have not looked, the line says so rather than reading as a zero.
Developer replies to reviews
Replies to fewer than 1 review in 20
Price in the store description
States a price and a billing period
Cancelling, in the store description
Says how to cancel
Themes reported by reviewers
2 themes reported
Counted from the reviews we have read for this app. "No theme reported" means no theme reached our reporting threshold — it is not a finding that nothing is wrong with this app, and we do not say it is.
Five-star share of ratings
65–79% five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.
In the package we scanned
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence about the app, not a finding about it.
Graded bands · predicate set 1.4 · how these are measured
What the analysis found
App-specific findings, grouped by what each one rests on. How they are graded lives on its own page.
The catch list 1
Charges we publish at a strength we stand behind: measured from an artefact, agreed by independent sources, or reported by enough users to clear that charge's own published bar.
Reported by users: Aggressive ad load
Advertising volume or placement that interrupts normal use: ads between every action, unskippable or forced full-screen ads.
What we saw: Raised by 36 distinct reviewers — 7.2% of the 501 reviews scanned on this store leg (App Store).
Context 1
Measured and published because a reader would want to know — deliberately not a charge. The measurement alone does not show a harm.
Cheapest and priciest options are far apart
The disclosed in-app purchases span an unusually wide price range. Published as context: the cheapest and priciest items may be different kinds of product entirely, so the spread alone deducts nothing.
What we saw: In-app purchases run from USD 1.99 to USD 49.99 — a 25x spread across 10 items
One source only — shown, not confirmed 1
A single kind of evidence. We publish these because withholding them would be the bigger distortion, and we do not treat any of them as a finding we stand behind.
Reported by users: Paywall blocks the basics
The core of the app — not extras — sits behind payment, or previously-free function moved behind a paywall.
What we saw: Paywall blocks the basics: raised by 7 distinct reviewers (1.4% of 501 reviews scanned)
Highlighted reviews
Representative public review excerpts shown as user reports, not Appworthy audit evidence.
“Ads — Makes me watch an ad or pay just to tune”
“To many ads — When I log in there are ads to use the app”
Assessment & version history
App changes and Appworthy events in one timeline.
Store listing updated to version 4.1.3.
What this app sells
Useful store-disclosed pricing, kept below the app listing.
Items shown9
Lowest$1.99
Highest$49.99
CoachTuner Weekly$6.99
CoachTuner Weekly$4.99
CoachTuner Yearly$29.99
CoachTuner Yearly$49.99
One year full access$49.99
Show 4 more purchases
CoachTuner Yearly$39.99
Full Access$7.99
80 Tunings$1.99
CoachTuner Premium$6.99