Comparison

Tuniversal vs Holon

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

Head to head
About

Tuniversal

This music practice tool offers a chromatic tuner, scale and interval practice, long note exercises, a metronome, and a pitch pipe. It's designed for woodwind and brass players, allowing customization for different instruments and tuning systems.

Highlights
  • Automatic chromatic tuner
  • Scale and interval practice
  • Long note practice with dynamics
  • Metronome with tempo adjustment
  • Pitch pipe for ear training
  • Instrument transposition support
  • Customizable tuning systems
Read full description

At last, a tuner app and practise tool that does not assume we are all guitar players! Tuniversal has been crafted to meet the needs of players of woodwind and brass instruments. No ads, sign-up or in app purchases! Tuniversal has 6 modes: (1) automatic tuner, (2) scale practise, (3) long note practise, (4) intervals practice, (5) metronome and (6) pitch pipe. Tuner: * Play a note, and Tuniversal will automatically detect the note you are playing and show if you are sharp or flat * Swipe between graphs showing the frequency of your note and the volume * Use this mode when you want Tuniversal to show if you are in tune. Scales, arpeggios, thirds and intervals: * Choose any key and scale type (major, harmonic minor, melodic minor, natural minor or chromatic) * Choose your practise mode (scales, thirds, arpeggios, intervals) and start note within the key * Tuniversal will count you in, show your chosen scale or notes, and track your pitch as you play * When you have finished, Tuniversal will score you for accuracy * You can also listen to your selected scale, thirds, intervals or arpeggio - great for training your ear. Just long press the play button! Long note practise: * Choose a note, the time you want to hold the note and dynamics (crescendo, decrescendo, swell or constant volume) * When you finish playing, Tuniversal will score you for accuracy in both dynamics and pitch! * Important: for best results, calibrate your loud and soft notes using the volume calibration feature under "settings" * Aim to keep your volume within the lines shown, whilst maintaining accurate pitch and a great tone. Pitch pipe: swipe to choose a note on the staff, and hit play to hear it. Use this mode to tune by ear. Metronome: set tempo using slider or tapping on the screen. Choose between traditional swinging metronome display or flashing metronome Settings: You can adjust: * Frequency of A: use this if your band or orchestra tunes to a frequency other than standard A440. You might also adjust the frequency of A if you are playing with a piano that has been tuned sharp or flat. * Your instrument : Tuniversal will automatically transpose the note played, based on your instrument choice. If you select a transposing instrument, the concert pitch note is also shown. Tuniversal will automatically adjust to the range and clef of your chosen instrument. * Volume calibration: Tuniversal will calculate the volume of your loud and soft notes, and use this information to score your long note practise * Tuning system: equal temperament or just intonation. See our website for more information! * Microphone sensitivity: Adjust to select how loud you must play for Universal to track your pitch. Set to “high” or “very high” if Tuniversal does not detect your playing. In noisy settings you might want to select “low” or “very low”. * Player skill: adjust to your ability. For beginners, Tuniversal will score your playing leniently. But for professionals, Tuniversal expects a high level of accuracy! * Centre frequency graph: You can tap on the frequency graph in tuner mode to clear and re-centre the graph. The graph will automatically centre on the frequency played, or tap to re-centre the graph on the note you have selected in "settings". * Force dark mode: You can choose to run the app in dark or light mode. * Headset mic: If you use Tuniversal with a headset, select whether you want to use the device mic or headset mic * Reset to defaults: Resets all settings

About

Holon

This app transforms your movement through cities into a dynamic, real-time musical score. It uses your physical location and activity to generate interactive synth music, encouraging outdoor exploration and turning listeners into performers.

Highlights
  • Human-powered music generation
  • Encourages outdoor activity
  • Zero UI for minimal distraction
  • Environmentally responsive music
  • Real-time synth music creation
  • Optional AirPods and Apple Watch integration
Features
Read full description

Holon makes the city your instrument. It turns your movement in the environment into a synthetic, interactive score that reflects your context, supports your activities and alerts you to changes in the surrounding area. Holon uses physical computing and a geospatial dataset to synthesize music on the iPhone in real time from your data - no streaming or AI involved, just pure DSP and logic. What Holon Does: * Human powered music. Every action generates dynamic, improvised synth music in real time. * Encourages outdoor activities. Holon doesn’t work in your apartment or by shaking your phone around. Move through streets, parks, and transit systems to make the music happen. * Stays out of your way. Zero UI means less screen time, no distractions. * Uses places and spaces to modify the music you make. The environment isn’t background - it’s the score. * The more and further you move, the more things happen in the music. Use your musical agency instead of skipping and swiping. Why Holon Exists:
 Music has been reduced to a commodity and a background activity for consumerism. Holon isn’t here to help you chill when you swipe, scroll and buy more stuff, or improve your focus when working for the Man. Holon is here to break away from the static, one-way relationship of streaming services and to put the human in the loop - yourself. Forget emoting celebrities with their false sincerity, throw overproduced passive soundscapes and statistical algorithms on the dung heap of history. Holon turns listeners into performers and unlocks the musical potential of places. How to Use: * Go outside - Holon needs space to function, just like you. Different districts, parks, bridges, shops, street furniture - all contribute to the musical output. Strolling around your apartment or shaking your phone won’t do. * Put the phone in your pocket or on your dashboard. * Walk, run, drive - the world is now the interface, space is the machine. * Use the big button in the middle to power Holon off when not in use - Auditory AR can be a battery-intensive process! * Optional Apple AirPods support for head-controlled musical interactions! * Optional Apple Watch support for heart rate-synced music (biofeedback) *the Watch app may take a moment to install* Requirements:
 * Available in over 1000 regions in more than 100 countries. * Check coverage or request a new area at holonic.systems/holon. * Best experienced with headphones. Ensure adequate battery level for extended use. * A data plan is required to access our geospatial engine but use of data is low. Holon: Become part of the circuit and… Become Sound™

Screenshots

Tuniversal4 screens
Holon4 screens

Verdict

The call

The clearest difference is in-app purchases: Tuniversal at none against Holon's 2. Tuniversal also leads on update cadence (every 2 weeks vs every 3 months) and review sentiment (100% vs 75%). Holon's advantage is rating (4.5 vs 4.3) and ratings volume (14 vs 4). On price, ads, device support and iOS requirement 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. Holon sells 2 one-off in-app purchases. Tuniversal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Holon holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 4 and 14 respectively. Written reviews complicate that: 100% of Tuniversal's written reviews are positive against 75% of Holon's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Tuniversal ships an update every 2 weeks, Holon every 3 months. The most recent releases landed on October 22, 2026 and October 3, 2026 respectively.

Scorecard6 real differences · 4 level
Tuniversal versus Holon: the parameters behind the verdict, then further details
ParameterTuniversalHolon
PriceFreeFree
Rating4.3 (4 ratings)4.5 (14 ratings) — better
Positive reviews100.0% of reviews — better75.0% of reviews
Number of ratings414 — better
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS13.012.0 — better
Further details — not scored
Size14 MB144 MB
Age rating4+4+
DeveloperPeter HallettHolonic Systems Oy

Customer experience

Tuniversal

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Holon

All ratings14 ratings
Positive85.7%
Neutral7.1%
Negative7.1%
Written reviews12 reviews
Positive75.0%
Neutral8.3%
Negative16.7%

In-app purchases

None

Tuniversal

No in-app purchases

2 purchases

Holon

One-time2
  • Apple Watch supportFree
  • Movesense SupportFree

Questions

Is Tuniversal free?
Tuniversal is free to download, with no in-app purchases.
Is Holon free?
Holon is free to download, with in-app purchases available.
Which has better reviews, Tuniversal or Holon?
Holon is rated higher. Tuniversal averages 4.3 out of 5 from 4 ratings, while Holon averages 4.5 from 14 ratings.
Do Tuniversal or Holon have ads?
Neither Tuniversal nor Holon shows ads.
Which is updated more often, Tuniversal or Holon?
Tuniversal ships an update every 2 weeks, and Holon every 3 months. Most recently, Tuniversal was updated on October 22, 2026 and Holon on October 3, 2026.

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