Comparison

Chord vs Math Riddles,Tricks,Questions

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

Head to head
About

Chord

Unlock musical creativity with a suite of tools for composing and practicing. Generate chord progressions, practice notation, train your ear, and even use your device as a MIDI keyboard. Includes a macOS version for seamless integration.

Highlights
  • Chord progression generation with inversions and extensions
  • Live playback as piano or synth
  • MIDI output to macOS
  • Guitar chord finder
  • Notation reading practice
  • Ear training for intervals and voice
  • macOS version included
Features
Currently charting
Read full description

This app plus your ears equals complete freedom in writing music! A comprehensive set of tools for any musician: * Chord Progression: Create beautiful chord progressions with full flexibility - use inversions, sus2, sus4, 7th, 9th, and more. Enjoy live playback as piano or synth, or send MIDI directly to your macOS computer! * MIDI Controller - Multiple layouts to control your DAW right from your device. (compatible with macOS Catalina and newer) * Modulation Pad - Helps when using a compact MIDI keyboard without built-in pitch and modulation controls. Also includes a sustain pedal (compatible with macOS Catalina and newer). * MIDI Keyboard - Transform your phone into a MIDI keyboard for your macOS computer (compatible with macOS Catalina and newer). * Notation Practice: Practice reading notes in both treble and bass clefs. * Interval Practice: Practice recognizing and comparing musical intervals by ear. * Chord Calculation: Help you learn how to calculate chords and progressions. * Voice & Ear Training: Simple, effective tools for voice practice and ear training. * Harmonic Match - helps you mix tracks in key while DJing. * Guitar Chords - helps you find and browse guitar chords. * Guitar Tuner - helps you tune your guitar to the most popular tunings. Plus, enjoy the macOS version included with your purchase!

About

Math Riddles,Tricks,Questions

This app offers quick math quizzes to boost mental agility and focus. It features timed challenges, customizable operations, and progress tracking for learners of all ages. Improve your speed and memory with daily brain training exercises.

Highlights
  • Daily brain training
  • Timed challenges
  • Customizable math operations
  • Multiple difficulty levels
  • Progress tracking
  • Game-like interface
Features
Read full description

Math Problems – Train Your Brain in Minutes a Day Boost your mental agility, speed, and focus with Mental Problems, the fun, game-like brain trainer for learners of all ages. Solve challenging problems, track your progress, and sharpen your mind—anytime, anywhere. Why Math Problems? Quick Practice: Endless problems for daily brain training. Timed Challenges: Test your speed with 60-second or 30-seconds sprints. Customizable Focus: Practice addition, subtraction, multiplication, division, or a mix. Multiple Difficulty Levels: From very easy to hard—grow at your own pace. Track Your Progress: Scoreboards and best records to measure improvement. How it Works: Choose your game mode and difficulty. Select the math operations you want to focus on. Solve problems as fast as you can! Compete against your best score and improve every day. Perfect for students, professionals, and anyone who wants to keep their brain sharp. Just a few minutes a day can help you think faster, remember more, and have fun while doing it! As a premium member of app, you enjoy unlimited access to all features! By subscribing you get unlimited access to all the app’s functionality for the whole duration of your subscription period. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You can manage your subscription and turn off the auto-renewal anytime through your Account Settings. Privacy Policy: https://mobile-apps.dev/mental-math-privacy-policy/ Terms of Use: https://mobile-apps.dev/mental-math-terms-of-use/

Screenshots

Chord4 screens
Math Riddles,Tricks,Questions4 screens

Verdict

The call

The clearest difference is review sentiment: Chord at 57% against Math Riddles,Tricks,Questions's 0%. Chord also leads on in-app purchases (none vs 3) and ads (none vs shown). Math Riddles,Tricks,Questions's advantage is price (Free vs $3.99) and update cadence (weekly vs monthly). On 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

Math Riddles,Tricks,Questions is free to download; Chord costs $3.99 up front. Math Riddles,Tricks,Questions sells 3 in-app purchases, starting at $2.99 per month. Chord asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chord holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 81 and 24 respectively. Written reviews point the same way: 57% of Chord's written reviews are positive against 0% of Math Riddles,Tricks,Questions's.

UpkeepUpdate frequency

Chord ships an update monthly, Math Riddles,Tricks,Questions weekly. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard10 real differences · 1 level
Chord versus Math Riddles,Tricks,Questions: the parameters behind the verdict, then further details
ParameterChordMath Riddles,Tricks,Questions
Price$3.99Free — better
Rating4.8 (81 ratings) — better4.4 (24 ratings)
Positive reviews57.1% of reviews — better0.0% of reviews
Number of ratings81 — better24
Update frequencyMonthlyWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#130 — better—
DevicesiPhone, iPad, iPod, Mac, Apple Watch — betteriPhone
Requires iOS15.0 — better16.6
Further details — not scored
Size47 MB33 MB
Age rating4+4+
DeveloperRoman SevastyanovViacheslav Khakhulin

Customer experience

Chord

All ratings81 ratings
Positive95.1%
Neutral1.2%
Negative3.7%
Written reviews21 reviews
Positive57.1%
Neutral19.0%
Negative23.8%

Math Riddles,Tricks,Questions

All ratings23 ratings
Positive87.0%
Neutral0.0%
Negative13.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Chord

No in-app purchases

3 purchases

Math Riddles,Tricks,Questions

Subscriptions2
  • Monthly Pro$2.991 Month
  • Yearly Pro3 Days trial$11.991 Year
One-time1
  • Lifetime Pro$17.99

Questions

Is Chord free?
Chord costs $3.99, with no in-app purchases.
Is Math Riddles,Tricks,Questions free?
Math Riddles,Tricks,Questions is free to download, with in-app purchases available.
Which has better reviews, Chord or Math Riddles,Tricks,Questions?
Chord is rated higher. Chord averages 4.8 out of 5 from 81 ratings, while Math Riddles,Tricks,Questions averages 4.4 from 24 ratings.
Do Chord or Math Riddles,Tricks,Questions have ads?
Math Riddles,Tricks,Questions shows ads; Chord does not.
Which is updated more often, Chord or Math Riddles,Tricks,Questions?
Chord ships an update monthly, and Math Riddles,Tricks,Questions weekly. Most recently, Chord was updated on November 7, 2026 and Math Riddles,Tricks,Questions on November 5, 2026.

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