Comparison

Keep Time vs CentiGrade Visual Tuner

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

Head to head
About

Keep Time

This application provides musicians with a visual metronome to enhance their playing. It offers adjustable tempo, customizable sounds and colors, and various subdivision options. Advanced features for rhythm simulation are available through in-app purchases.

Highlights
  • Adjustable speed with touch gestures
  • 4 metronome sound options
  • 7 color choices for visualizer
  • Sub-division options (8th, 16th, triplets)
  • Configurable visualizer beats per measure
  • Apple Watch remote tempo adjustment
Features
Read full description

Are you a musician who wants to improve your playing? Metronomes are a great way to work on your speed, timing, and accuracy, no matter what instrument you play! Keep Time is a free, fully functioning metronome with a strong visual component. Featuring: - Adjustable speed using touch gestures. You can tap the screen to synchronize it with your tempo. - 4 different metronome sounds - 7 different color choices for the visualizer and interface, including a "rainbow" option - Sub-division options such as: 8th notes, 16th notes, triplets, and shuffles - Visualizer configurable to display 2-8 beats per measure - Advanced features such as Auto Adjust and Simulate Human Rhythm available via In-App purchase - Support for iPad multitasking - Remote tempo adjustment using Apple Watch Directions: Keep Time is operated by using the menu at the bottom of the screen. Start and pause the metronome by using the "Play" button on the far left. Use the "Settings" menu to change the speed, sounds, and colors. Push the "Visualizer" button to remove the settings menu overlay. Finally, the "More" button provides technical information and links to the entire Okunarium Labs catalog.

About

CentiGrade Visual Tuner

This app provides instant, ad-free tuning with a unique rolling trace feature for pitch practice. Its interface dynamically zooms as you approach the target note, offering multiple visual modes and presets for various instruments.

Highlights
  • Instant tuning on launch
  • Rolling trace for pitch history
  • Dynamic zoom interface
  • Fluid wave visualizer
  • Chromatic, Guitar, Bass presets
Features
Read full description

No Ads: Instant tuning as soon as you open the app. Rolling Trace: See a historical line of your pitch for perfect intonation practice. Dynamic Zoom: The interface adapts as you get closer to your target note. Multiple Modes: Toggle between a fluid wave visualizer and the rolling history roll. Presets: Support for Chromatic, Guitar, and Bass tuning.

Screenshots

Keep Time4 screens
CentiGrade Visual Tuner4 screens

Verdict

The call

The clearest difference is price: Keep Time at Free against CentiGrade Visual Tuner's $0.99. CentiGrade Visual Tuner's advantage is rating (5.0 vs 4.0) and in-app purchases (none vs 1). On ratings volume, 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

Keep Time is free to download; CentiGrade Visual Tuner costs $0.99 up front. Keep Time sells 1 one-off in-app purchase. CentiGrade Visual Tuner asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CentiGrade Visual Tuner holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Keep Time ships an update every 4 months, CentiGrade Visual Tuner every 4 days. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Keep Time versus CentiGrade Visual Tuner: the parameters behind the verdict, then further details
ParameterKeep TimeCentiGrade Visual Tuner
PriceFree — better$0.99
Rating4.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews90.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 4 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size3 MB18 MB
Age rating4+4+
DeveloperJustin OkunPHILIP BRADLEY KING

Customer experience

Keep Time

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

CentiGrade Visual Tuner

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

In-app purchases

1 purchases

Keep Time

One-time1
  • Feature Pack$1.99
None

CentiGrade Visual Tuner

No in-app purchases

Questions

Is Keep Time free?
Keep Time is free to download, with in-app purchases available.
Is CentiGrade Visual Tuner free?
CentiGrade Visual Tuner costs $0.99, with no in-app purchases.
Which has better reviews, Keep Time or CentiGrade Visual Tuner?
CentiGrade Visual Tuner is rated higher. Keep Time averages 4.0 out of 5 from 2 ratings, while CentiGrade Visual Tuner averages 5.0 from 1 ratings.
Do Keep Time or CentiGrade Visual Tuner have ads?
Neither Keep Time nor CentiGrade Visual Tuner shows ads.
Which is updated more often, Keep Time or CentiGrade Visual Tuner?
Keep Time ships an update every 4 months, and CentiGrade Visual Tuner every 4 days. Most recently, Keep Time was updated on October 24, 2026 and CentiGrade Visual Tuner on October 24, 2026.

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