Notebook Calculator vs Ukulele Chord Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Notebook Calculator
This app functions as a powerful calculator with a notebook interface, allowing users to write, edit, save, and graph complex calculations. It supports a wide range of mathematical and statistical functions, including scientific and complex number calculations, with features like copy, cut, and paste for easy editing.
- Notebook interface for calculations
- Edit, save, and graph history
- Scientific and graphic calculator functions
- Complex number calculations
- Extensive mathematical functions
- Statistical functions
- File management for calculations
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DOING LONG CALCULATIONS IN NOTEBOOK ! GO BACK & CHANGE ERRORS EASILY ! JUST LIKE TYPE IN A TEXT FIELD ! COPY + CUT + PASTE EDIT & SAVE CALCULATION HISTORY ! SCIENTIFIC & GRAPHIC CALCULATOR ! • It Supports the File Management ! - Create a file - Save - Open - Delete • Mathematical Functions: SIN(X) : sine of x COS(X) : cosine of x TAN(X) : tangent of x COT(X) : cotangent of x ASIN(X) : arcsine of x ACOS(X) : arccosine of x ATAN(X) : arctangent of x SINH(X) : hyperbolic sine COSH(X) : hyperbolic cosine TANH(X) : hyperbolic tangent ASINH(X) : inverse hyperbolic sine ACOSH(X) : inverse hyperbolic cosine ATANH(X) : inverse hyperbolic tangent SQRT(X) : square root of x ABS(X) : absolute value of x FCT(X) : x factorial LOG(X,Y) : logarithm of y to base x LN(X) : natural logarithm of x LOG(X) : base-10 logarithm of x LOG10(X) : base-10 logarithm of x LOG2(X) : base-2 logarithm of x EXP(X) : base-e exponential of x ERF(X) : the error function of x ERFC(X) : the complementary error function of x ROUND(X) : integral nearest to x CEIL(X) : the smallest integral that is not less than x FLOOR(X) : the largest integral that is not greater than x TGAMMA(X) : the gamma function of x LGAMMA(X) : the natural logarithm of the absolute value of the gamma function of x X^Y : y-th power of x • Statistical functions: SUM(a1,a2,a3,a4) : a1+a2+a3+a4 AVERAGE(a1,a2,a3,a4) : (a1+a2+a3+a4)÷4 VARIANCE(a1,a2,a3,a4) : variance SD(...) : standard deviation SUMSQ(...) : sum of squares AD(...) : absolute deviation CV(...) : coefficient of variation SVARIANCE(...) : sample variance SSD(...) : sample standard deviation SCV(...) : sample coefficient of variance • Help Manual: “//” means a line comment or annotation. A=2 B=3 C=A+B Click “Run”, the screen shows: C=5 If the line C=A+B is annotated , A=2 B=3 //C=A+B Click “Run”, the screen shows: B=3 - Variable Naming Rules: Start with letters, and not involving keywords. A, A1, B25, HAT (right) PRINT1, COS (wrong) - The Usage of PRINT: A=10+5 B=10/5 PRITN A,B Click “Run”, the screen shows: A=15 B=2 Default variable name is RESULT , e.g. 16+5*6 Click “Run”, the screen shows: RESULT=46 - Combination & Arrangement: C(n,k) = n!/(k!(n-k)!) A(n,k) = n!/(n-k)! - Complex Number When there is “i” or “∠” on the screen, it automatically enters Complex Number Calculation Mode. e.g. X=3+4i or X=5∠53.1° 9 functions are available for the Mode. SIN(X), COS(X), TAN(X) COT(X), SINH(X), COSH(X) SQRT(X), ABS(X), CONJUGATE(X) - Integral INTEGRAL X²,2,4 Default precision is 300 times of calculations. It can be more accurate, e.g. 500 times. INTEGRAL X²,2,4,500 - Graphics PLOT SIN(X) PLOT X² Default length = 10, width = 10. Specify the lenght = 20, width = 5. Then we have, PLOT X²,20,5 Default dense is 150 points. It also can be customized, e.g. 200 points. PLOT X²,20,5,200
Ukulele Chord Master
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Ukulele Chord Master - Your Smart Chord Collection ·2000+ chord library fully covered From basic triads to complex jazz chords, all chords required for modern music styles are included to meet all needs from entry to professional. ·Interactive fingering demonstration High-definition fingerboard diagram, each chord provides multiple versions of fingering, including simplified fingering. ·Real chord pronunciation Click to listen to the standard timbre, support automatic arpeggio playback, help the ear remember the color of each chord. ·Smart mode filtering Quickly find exclusive chords in various modes such as C and D, and support accurate filtering by chord attributes (major, minor, seventh, suspension, etc.). ·Professional music theory assistance Each chord is marked with emotion to help you deeply understand the principles of harmony. *Applicable scenarios: -Daily practice to check for omissions -Quick reference for improvisation -Find inspiration for song creation -Emergency reference for live performances Download now and start your journey to become a chord master!
Screenshots
Verdict
The clearest difference is update cadence: Ukulele Chord Master at every 8 months against Notebook Calculator's every 40 months. Ukulele Chord Master also leads on price ($0.99 vs $1.99). On ads, in-app purchases, 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
Notebook Calculator costs $1.99 and Ukulele Chord Master $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Notebook Calculator ships an update every 40 months, Ukulele Chord Master every 8 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Notebook Calculator | Ukulele Chord Master |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 40 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15 — better |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | +4 | 4+ |
| Developer | 俊 姜 | 丽俨 龚 |
In-app purchases
Notebook Calculator
No in-app purchases
Ukulele Chord Master
No in-app purchases
Questions
Is Notebook Calculator free?
Is Ukulele Chord Master free?
Do Notebook Calculator or Ukulele Chord Master have ads?
Which is updated more often, Notebook Calculator or Ukulele Chord Master?
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