What's New

• iOS 11 SDK Compatibility (iPhone X)
• Fixed Computation Bugs

App Description

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

iPhone Screenshots

(click to enlarge)

Notebook Calculator screenshot 1 Notebook Calculator screenshot 2 Notebook Calculator screenshot 3 Notebook Calculator screenshot 4 Notebook Calculator screenshot 5

iPad Screenshots

(click to enlarge)

Notebook Calculator screenshot 6 Notebook Calculator screenshot 7 Notebook Calculator screenshot 8 Notebook Calculator screenshot 9 Notebook Calculator screenshot 10

App Changes

  • December 06, 2016 Initial release
  • June 15, 2019 New version 1.1
  • June 15, 2019 Price decrease: $2.99 -> $1.99
  • June 16, 2019 Price decrease: $2.99 -> $1.99