Comparison

KeyBridge for DJs vs Tuner · Baro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KeyBridge for DJs

This tool helps DJs create smoother transitions by suggesting compatible musical keys for their next track. It offers three distinct transition types: energy boost, mood switch, and calm down, all accessible with a single tap. Designed for live performance, it works offline and features a minimalist interface.

Highlights
  • Suggests compatible musical keys
  • Three transition types: energy boost, maj/min, calm down
  • Works 100% offline
  • Zero learning curve for mid-set use
  • Full 24-key wheel
  • Dark interface for booth visibility
  • Haptic feedback
Read full description

Stop guessing which track to play next. KeyBridge is the key reference tool built for DJs who want their sets to sound more polished - without memorizing music theory. Here's what the smoothest DJ sets have in common: the tracks share compatible keys. When the next track flows musically from the last one, every transition feels right. When it doesn't, something feels off - even if you can't explain why. KeyBridge gives you the rule in one tap. --- HOW IT WORKS --- Pick the key of your current track. KeyBridge instantly shows you three ways to go next: COUNTERCLOCKWISE (-1) - Bring it down. One step down the wheel. RELATIVE - Switch the mood. Same root, flip between major and minor. CLOCKWISE (+1) - Lift the crowd. One step up the wheel. Tap any suggestion to jump there. Chain transitions. Plan your whole set in minutes. --- WHY DJs LOVE IT --- - Works 100% offline - no signal, no lag on stage - Zero learning curve - tap and go, even mid-set - Full 24-key wheel (12 major + 12 minor) - Built for speed - 15-second auto-return keeps you focused - Haptic feedback - feel the response in your palm - Designed to disappear in the booth - dark interface keeps your eyes adjusted and the atmosphere intact - Retro DJ-hardware aesthetic that looks right next to your gear - iPhone and iPad - use it in the booth, the bedroom, or the bus --- WHO IT'S FOR --- Beginners: Finally understand why some transitions work and others don't. Build your first key-matched set with confidence. Intermediate DJs: Stop relying on memory during live sets. Read the crowd, not your notes. Producers & Remixers: Find compatible keys for mashups, bootlegs, and edits in seconds. --- FREE AND PRO --- KeyBridge is free to download. Free includes the full 24-key wheel, the three core moves (Counterclockwise, Relative, Clockwise), the Spectrum Drive theme and Keep Screen Awake. KeyBridge Pro is a one-time purchase that adds the advanced moves (Diagonal -1 / +1, +5 Lift, +7 Shift), all three colour themes and every auto-return option. No subscription. --- THE PROMISE --- Follow KeyBridge's suggestions for one set. You'll hear the difference immediately. Your transitions will feel tighter, your energy arcs will land, and the dancefloor will stay with you longer. This isn't a theory app. It's a live-performance companion. --- Built by a working DJ for working DJs. No ads. No subscriptions. No data collection. Ever.

About

Tuner · Baro

This offline chromatic tuner analyzes your microphone's audio in real-time to display the exact note and frequency you're playing. It prioritizes user privacy by processing all audio analysis on-device without any internet connection, tracking, or data collection.

Highlights
  • Real-time pitch detection
  • Offline functionality
  • On-device audio analysis
  • Clear note name and frequency display
  • Visual tuning indicator
  • Adjustable concert-pitch reference
  • Screen stays awake during use
Features
Read full description

Your audio never leaves your phone. Tuner is a chromatic tuner that listens through your microphone and tells you the exact note you're playing — entirely on your device. No internet, no account, no tracking. Don't trust it? Turn on airplane mode: turn off Wi-Fi and cellular, and it keeps working. Nothing is ever recorded, and nothing is ever uploaded. Play a string, press a key, or sing a note. A big, clear note name fills the center (like A4), with the live frequency in Hz and a smooth 180-degree needle that swings with every cent. The moment you land in tune, the whole note glows yellow — you tune by feel, not by squinting at numbers. WHY OMITTUNER IS DIFFERENT Most tuners pay their bills with ads, accounts, or tracking of mic-adjacent data — or gate real accuracy behind a monthly subscription. Tuner does neither. No ads. No subscriptions. No accounts. PRIVATE BY DESIGN • Microphone audio is analyzed in memory and discarded instantly — never written to disk, never uploaded. • Pitch detection runs 100% on device with pure-DSP YIN math. No machine-learning model, no cloud, nothing sent to any server. • Zero analytics, zero telemetry, zero third-party SDKs. Privacy label: Data Not Collected. WHAT IT DOES • Real-time pitch detection, fast enough to follow your tuning peg as you turn it. • A huge, readable note name plus the live frequency in Hz — legible across a music stand. • A 180-degree needle that leans flat or sharp, and glows when you're within 5 cents. • Adjustable concert-pitch reference — 432, 438, 440, 442, or 444 Hz, one tap, remembered next time. • The screen stays awake mid-session so you can keep both hands on the instrument. GREAT FOR Guitar, bass, ukulele, violin, cello, bağlama / saz and other strings; brass and woodwind intonation checks; singers and choirs warming up; piano reference checks; students and teachers in any room. HONEST ABOUT WHAT IT IS Tuner reads what your microphone hears using 12-tone equal temperament to within about 5 cents, across 25–4500 Hz. It's an excellent everyday and practice-room tuner — it isn't a studio strobe and doesn't claim that precision. NO SUBSCRIPTIONS, NO ADS No subscriptions, no in-app purchases, no ads. That's the whole deal. Part of the Baro family — The tools you reach for first.

Screenshots

KeyBridge for DJs4 screens
Tuner · Baro4 screens

Verdict

The call

The clearest difference is in-app purchases: Tuner · Baro at none against KeyBridge for DJs's 1. Tuner · Baro also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (13.0 vs 26.2). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KeyBridge for DJs sells 1 one-off in-app purchase. Tuner · Baro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for KeyBridge for DJs against 5.0 for Tuner · Baro. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

KeyBridge for DJs ships an update every 2 months, Tuner · Baro every 3 days. Both last shipped on October 25, 2026.

Scorecard4 real differences · 5 level
KeyBridge for DJs versus Tuner · Baro: the parameters behind the verdict, then further details
ParameterKeyBridge for DJsTuner · Baro
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.213.0 — better
Further details — not scored
Size5 MB20 MB
Age rating4+4+
DeveloperTomocreate, Inc.Euiseok Kim

Customer experience

KeyBridge for DJs

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Tuner · Baro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

KeyBridge for DJs

One-time1
  • KeyBridge Pro$2.99
None

Tuner · Baro

No in-app purchases

Questions

Is KeyBridge for DJs free?
KeyBridge for DJs is free to download, with in-app purchases available.
Is Tuner · Baro free?
Tuner · Baro is free to download, with no in-app purchases.
Which has better reviews, KeyBridge for DJs or Tuner · Baro?
KeyBridge for DJs and Tuner · Baro are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do KeyBridge for DJs or Tuner · Baro have ads?
Neither KeyBridge for DJs nor Tuner · Baro shows ads.
Which is updated more often, KeyBridge for DJs or Tuner · Baro?
KeyBridge for DJs ships an update every 2 months, and Tuner · Baro every 3 days. Most recently, KeyBridge for DJs was updated on October 25, 2026 and Tuner · Baro on October 25, 2026.

Other comparisons