89-in-1 Statistics Calculator Education App Review (iOS, $0.99)


Languages: English

Seller: Charles Vu

- Fix to the lognormal calculators: input should be sigma, not sigma^2

Customer Ratings

Current Version:
2 Ratings
All Versions:
76 Ratings


***** "Great app! Highly recommended for students!" - Poisson110
***** "Perfect...for statistics students!" - IV.XI.IV

Note: All of the statistics solvers in this app are also in my 179-in-1 Math Calculator app. Do NOT purchase 89-in-1 Statistics Calculator if you already own that app.

With this app, you get 89 solvers (actual calculators, not formulas) on topics in statistics.

- 89 solvers covering statistics
- Add a solver to your favorites with just one tap
- Edit and organize your favorites list from the “Favorites” tab
- See your most recently viewed solvers from the “Recents” tab
- Check out your most viewed solvers from the “Most Viewed” tab
- Request solvers or send comments in-app using the “Contact Us” tab.

Probability Distributions (78 solvers):
1. Binomial Density
2. Binomial Distribution
3. Binomial Inverse
4. Binomial Mean, Var, etc.
5. Binomial Random
6. Cauchy Density
7. Cauchy Distribution
8. Cauchy Inverse
9. Cauchy Random
10. Chi-Squared Density
11. Chi-Squared Distribution
12. Chi-Squared Inverse
13. Chi-Squared Mean, Var, etc.
14. Chi-Squared Random
15. Exponential Density
16. Exponential Distribution
17. Exponential Inverse
18. Exponential Mean, Var, etc.
19. Exponential Random
20. Fisher Density
21. Fisher Distribution
22. Fisher Inverse
23. Fisher Mean, Var, etc.
24. Fisher Random
25. Geometric Density
26. Geometric Distribution
27. Geometric Inverse
28. Geometric Mean, Var, etc.
29. Geometric Random
30. Gumbel Density
31. Gumbel Distribution
32. Gumbel Inverse
33. Gumbel Mean, Var, etc.
34. Gumbel Random
35. Hypergeometric Density
36. Hypergeometric Distribution
37. Hypergeometric Inverse
38. Hypergeometric Mean, Var, etc.
39. Hypergeometric Random
40. Lognormal Density
41. Lognormal Distribution
42. Lognormal Inverse
43. Lognormal Mean, Var, etc.
44. Lognormal Random
45. Negative Binomial Density
46. Negative Binomial Distribution
47. Negative Binomial Inverse
48. Negative Binomial Mean, Var, etc.
49. Negative Binomial Random
50. Normal Density
51. Normal Distribution
52. Normal Inverse
53. Normal Mean, Var, etc.
54. Normal Random
55. Pareto Density
56. Pareto Distribution
57. Pareto Inverse
58. Pareto Mean, Var, etc.
59. Pareto Random
60. Poisson Density
61. Poisson Distribution
62. Poisson Inverse
63. Poisson Mean, Var, etc.
64. Poisson Random
65. Student-t Density
66. Student-t Distribution
67. Student-t Inverse
68. Student-t Mean, Var, etc.
69. Student-t Random
70. Uniform Density
71. Uniform Distribution
72. Uniform Inverse
73. Uniform Mean, Var, etc.
74. Weibull Density
75. Weibull Distribution
76. Weibull Inverse
77. Weibull Mean, Var, etc.
78. Weibull Random

Statistics (11 solvers):
79. Average (Arithmetic Mean)
80. Average (Geometric Mean)
81. Combinations
82. Factorial
83. Median
84. Mode
85. Permutations
86. Random Number (Continuous)
87. Random Number (Discrete)
88. Standard Deviation
89. Variance

Customer Reviews

  • HS Stats class

    by Silas Richards

    Great alternative to T. I. Calculators. Easy to use and understand.

  • Statistics support

    by cb ipod

    this app was most helpful through graduate and doctorate stats courses. it would be more helpful to have the app more ipad friendly or a help note to make it that way.

  • Nice app

    by Jimjim Beam

    I'm very pleased with this app because it provides all the formulas I need for my independent research. Great value too. I really can't say enough good things about it.

  • It's okay

    by Joshburbine

    It's a useful app, I wish I could copy and paste my data and use it in different data results like mean, median and mode

  • Good app

    by twoboats

    Have found it very useful for some specific statistics uses.

  • Very handy

    by Patinhb

    I use the hyper geometric function quite often. The function isn't available on any calculator that I have found. Being able to use it on my iPhone makes it worth the price to me.

  • Stats

    by Elie322

    Great app!! Does all the work for you.

  • Mis-advertised

    by TC3StatsStudent

    Works okay. Doesn't actually have as much as is advertised. Worth the little bit of money, but not a great app.

  • grad student

    by rmmikol

    Good program - great value

  • My back up

    by XxRazonXx

    When I forget my calculator, I use this app in statistics because it essentially has all of the required formulas that would be needed.

  • Perfect for school

    by Jwhiteman

    It's exact and made it easier to get through school. Although not all is there. Wish there was linear correlation, regression, t distribution table

  • Awesome

    by THE Æ

    This app is soo cool! I wish my professor would let me use it on tests.

  • Stats

    by VooDoo_2

    Is helpful

  • Great tool

    by Reedjy

    Excellent app. Has most features needed for quick stats. Could add a viewer to show formulas or how result was calculated.

  • Great app

    by maricor2011

    Would be better if there was like a feature in that app that would show how the problem was solved. Great app though overall I have used it to check my answers after doing the work.

  • Good app

    by Gradstu56

    Well done. Currently using it for a statistics course as a backup. Easy to use

  • Great apps

    by MBA grad

    Good for probability distribution calculations

  • Great App!!!

    by Wsustudent

    Works great and is simple to use!!! A must have for stat students!

  • I like it.

    by Stats Instructor

    I left my calc at the office. This app allowed me to help a student at home online with normalcdf() on the TI-83/84. I haven't used anything else, but I am encouraged.

  • Good app

    by XuHan

    Good app, easy to use.

  • Can't do a majority of statistics work

    by Kono_Loko

    Misleading app name, can rarely even do the most standard of calculations, annoyingly if you're looking for a stat calculator you may have to just buy a TI-stat calculator because I can assure you that 99.9% of the time this app will be absolutely useless. Top 10 apps that make me wish there was a refund button.

  • Ehh

    by Marina F.

    Wish you could copy and paste and do mean, median and mode all together. Writing ten, 5-digit numbers is tedious enough and you can't copy and paste them?! Annoying.

  • Tried it against Minitab

    by PhD@work

    Does not work!!! Don't waste your money.

  • The worst

    by Kalei81

    Doesnt really work, dont waste your mobey

  • Not worth it!

    by Jess&B

    Don't waste your money!

  • Glitchy

    by Jptyper

    I have had many issues with this app. It will glitch out every other entry of data. I find it quite irritating. Wish I could get my money back, even though it was only 99cents.

  • Ehh

    by Statdissapointed

    This app did not help with what I need!! Doesn't work with data sets.

  • MBA Student

    by Randyb001

    Worthless. As a calculator it offers nothing.

  • Very useful and handy app

    by Sigmordial

    I use this app to quickly find p-values. Also like to use the discrete distributions to find pmf and cdf.

  • Don't waste your money

    by Brandayyy

    I bought this app because I had forgotten my graphing calculator and we had a Stats quiz, I could not even figure out how to use the app and it was no help. I contacted the creator and they promptly responded not answering my questions, when I provided more details they still have yet to respond to my question (2 weeks later). I am sure there are better apps out there, don't waste your time or money on this one.

  • Very recommended

    by Kurtnero

    Useful, with all descrepitive statistical assignments!

  • No good

    by white942

    I waisted and hour trying to figure out what was wrong with my calculations after using a statistic I got from this calculator. Then I compared it with a computer program and found that it must round off or something. The answer I was looking for was .91348 and it rounded it to .95. That's huge!! So don't waist your time and money.

  • Okay

    by mmx49

    Edit: fixed bug quickly. Haven't seen any others yet. Keep up the good work!

  • This app is confusing

    by SoccarMom4678

    I bought this app, because it was only a buck. I suppose if you already know what youre doing, its a good reference, but I'm taking statistics and get lost when I open this app. I recommend purchasing the app "Statistics I" its like, $4.99, but is worth the money, trust me. It has a few errors I have submitted to getting fixed, but the app as a whole is much better than this one.

  • Issues

    by StatStudent

    Try Poisson(2.5) and p(x=3). you get wrong answer. Not sure if there are anymore issues.

  • Perfect for App for Statistics Students

    by IV.XI.IV

    I'm currently in an MBA student and this calculator is great. I have $150 TI calculator I don't use anymore because of this app. It gets rid of the need ot memorize formulas and lets you focus on the concepts. The only thing I could suggest adding is a graphic display of the curves.

  • Great app

    by Yonq2k

    Perfect for university students.

  • Great app!

    by Poisson110

    Highly recommended for students!

  • View More


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