Comparison

Solving Linear Equation PRO vs Chord

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

Head to head
About

Solving Linear Equation PRO

Solve linear equations with detailed, step-by-step solutions and visualize the results with plots. Save and access past calculations through a history function, and easily share your final answers.

Highlights
  • Step-by-step equation solving
  • Plotting of results
  • Calculation history
  • Input validation
  • Decimal and fraction support
  • Solution sharing
Features
Read full description

This app solves linear equations step by step and plots the result. All the performed calculations are stored in the history. Just enter m, n or two coordinate points and the equation is solved. The final solution can be shared. [ What you get ] - solving logic for different inputs like: - two points - one point and slope - one point and intersection with axis of ordinates - linear equation and x coordinate - linear equation and y coordinate - the input supports decimals and fractions - plot of the result - history function that keeps your given inputs - full solution shown in all necessary steps - no ads! [ How to use ] - there are 6 fields where you can insert any value with a modified keyboard - m for the slope - n for the intersection with the axis of ordinates - x1, y1 and x2, y2 as coordinates for the points - if you enter 3 or 4 values (depending on the calculation you need) and hit the calculate button, the app switches to the solution page - when you hit the calculate button without giving enough values, the app marks it as yellow - when you hit the calculate button with giving invalid values, the app marks it as red - you can tap and/or swipe to get to the solution or history page - the history entries can be deleted or put in order manually - if you click on one history entry, the app will load it to the inputs - you can delete all history entries by using a button

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
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! * Guitar Chords - helps you find and browse guitar chords. * 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. * Chord Calculation: Help you learn how to calculate chords and progressions. * Interval Practice: Practice recognizing and comparing musical intervals by ear. * Voice & Ear Training: Simple, effective tools for voice practice and ear training. * Harmonic Match - helps you mix tracks in key while DJing. * Guitar tuner - helps you tune your guitar to the most popular tunings. * 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). Plus, enjoy the macOS version included with your purchase!

Screenshots

Solving Linear Equation PRO4 screens
Chord4 screens

Verdict

The call

The clearest difference is review sentiment: Chord at 57% against Solving Linear Equation PRO's 0%. Chord also leads on rating (4.8 vs 4.6) and device support (5 vs 3). Solving Linear Equation PRO's advantage is price ($1.99 vs $3.99). On update cadence, ads, in-app purchases 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

Solving Linear Equation PRO costs $1.99 and Chord $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Chord holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 22 and 81 respectively. Written reviews point the same way: 0% of Solving Linear Equation PRO's written reviews are positive against 57% of Chord's.

UpkeepUpdate frequency

Solving Linear Equation PRO ships an update every 3 weeks, Chord every 4 weeks. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

Scorecard6 real differences · 4 level
Solving Linear Equation PRO versus Chord: the parameters behind the verdict, then further details
ParameterSolving Linear Equation PROChord
Price$1.99 — better$3.99
Rating4.6 (22 ratings)4.8 (81 ratings) — better
Positive reviews0.0% of reviews57.1% of reviews — better
Number of ratings2281 — better
Update frequencyEvery 3 weeks — betterEvery 4 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac, Apple Watch — better
Requires iOS15.015.0
Further details — not scored
Size179 MB46 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRRoman Sevastyanov

Customer experience

Solving Linear Equation PRO

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Chord

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

In-app purchases

None

Solving Linear Equation PRO

No in-app purchases

None

Chord

No in-app purchases

Questions

Is Solving Linear Equation PRO free?
Solving Linear Equation PRO costs $1.99, with no in-app purchases.
Is Chord free?
Chord costs $3.99, with no in-app purchases.
Which has better reviews, Solving Linear Equation PRO or Chord?
Chord is rated higher. Solving Linear Equation PRO averages 4.6 out of 5 from 22 ratings, while Chord averages 4.8 from 81 ratings.
Do Solving Linear Equation PRO or Chord have ads?
Neither Solving Linear Equation PRO nor Chord shows ads.
Which is updated more often, Solving Linear Equation PRO or Chord?
Solving Linear Equation PRO ships an update every 3 weeks, and Chord every 4 weeks. Most recently, Solving Linear Equation PRO was updated on October 2, 2026 and Chord on October 12, 2026.

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