Comparison

Pocket Slide Rule Expert vs Bode Plot Calculator

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

Head to head
About

Pocket Slide Rule Expert

Learn to use a classic slide rule with this app. It offers precise calculations and an "auto-slide-rule" mode to demonstrate operations. Save and reuse slider positions for frequent calculations.

Highlights
  • Classic slide rule simulation
  • Auto-slide-rule demonstration mode
  • Precise cursor and slider control
  • Save and reuse slider positions ('Snaps')
  • 19 basic operations supported
  • Multiplication, division, powers, logs, trig functions
Features
Read full description

When it comes to nerd street cred, having a slide rule is not enough. You need to know how to use it! Hence, Pocket Slide Rule Expert. This has the style of a classic rule, including great precision, but can also show you how to DO calculations. Learn simply by watching auto-slide-rule mode. Select from 19 different basic operations, including: -Multiplication and Division -Squares, Cubes, arbitrary powers -Logarithms, both natural and base 10 -Trigonometric and reverse trig functions Think you can't perform precise calculations using a touch screen? Not at all! Try the newly-added "brakes" button. By holding it down, you can move the cursor and slider with extreme precision. Are you a power user? Then check out the 'Snaps.' With the click of a button, quickly save a slider position -- and reuse it time and time again. Multiply by the square root of 2 a lot? Make a button for it! Speed, accuracy, and a teacher right there with you.

About

Bode Plot Calculator

This advanced calculator is designed for creating Bode plots and Nyquist diagrams. It also supports complex number calculations and time-domain graphing. Users can export plots and calculations for further analysis.

Highlights
  • Bode Plot generation
  • Nyquist Diagram visualization
  • Complex number calculations
  • Time-domain graphing
  • Export plots and calculations
  • Intuitive interface with themes
  • Sliders for real-time parameter changes
Features
Read full description

This is not a standard scientific calculator, it is optimized to evaluate Bode plots and Nyquist diagrams. This calculator is also fully compatible with the complex domain and standard graphs in time domain (linear). Writing a calculation produces the numeric result, as any calculator, while adding the variable t produces a plot in time domain. Inserting f, omega or s instead, produces the Bode Plot, then it is possible to switch to the Nyquist diagram. Functionalities: - Nice looking interface, intuitive, immediate and able to not only replace, but to enrich hardware calculators. - Elegant and modern themes and colors to choose from, all included in the first purchase. - A little magic feature: in scientific notation, swipe over the result to move the decimal dot and see the ten power change :) - All scientific function (sin, cos, tan, ..., log, ln, exp, ..., atan2). - Calculation structured in 2D, with fractions, powers, roots, brackets and so on, with very easy to nest operations, no limits! - Tap on the calculation to place the cursor and write. - Undo/Redo buttons - A catalog with 40 physics fundamentals constants, with name and unit of measure, ready to be inserted. - Possibility to store values. - Chronology. - Sliders: yes, you can insert many parameters and change them swiping on a slider to see the effect in real time. - Spaces: access to up to 4 spaces on which you can edit and keep calculations, useful also to superpose different plots. - Joystick mode: swipe over the buttons to move the cursor (still in beta). - Bode Plots: inserting a variable, s, omega or f, produces the Bode Plot, toggling on the button it switches to the Nyquist diagram. - Linear Plots: inserting the t variable, produces a plot in a linear domain. - Complex numbers: the app automatically uses complex numbers when needed, no need to set the complex mode. - Plots also support for complex values. - Integrals and derivatives (in the future also limits). - Export plot and calculation as image/PDF, copy result as text

Screenshots

Pocket Slide Rule Expert4 screens
Bode Plot Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Bode Plot Calculator at 100% against Pocket Slide Rule Expert's 83%. Bode Plot Calculator also leads on rating (5.0 vs 4.8). Pocket Slide Rule Expert's advantage is update cadence (every 4 months vs every 12 months) and price ($0.99 vs $3.99). On ads, in-app purchases, monetization model and device support 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

Pocket Slide Rule Expert costs $0.99 and Bode Plot Calculator $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Bode Plot Calculator holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 83% of Pocket Slide Rule Expert's written reviews are positive against 100% of Bode Plot Calculator's.

UpkeepUpdate frequency

Pocket Slide Rule Expert ships an update every 4 months, Bode Plot Calculator every 12 months. The most recent releases landed on September 21, 2026 and October 8, 2026 respectively.

Scorecard6 real differences · 4 level
Pocket Slide Rule Expert versus Bode Plot Calculator: the parameters behind the verdict, then further details
ParameterPocket Slide Rule ExpertBode Plot Calculator
Price$0.99 — better$3.99
Rating4.8 (4 ratings)5.0 (1 ratings) — better
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings4 — better1
Update frequencyEvery 4 months — betterEvery 12 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better15
Further details — not scored
Size16 MB9 MB
Age rating4+4+
DeveloperTestTubeGamesEdoardo Orzes

Customer experience

Pocket Slide Rule Expert

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Bode Plot Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Pocket Slide Rule Expert

No in-app purchases

None

Bode Plot Calculator

No in-app purchases

Questions

Is Pocket Slide Rule Expert free?
Pocket Slide Rule Expert costs $0.99, with no in-app purchases.
Is Bode Plot Calculator free?
Bode Plot Calculator costs $3.99, with no in-app purchases.
Which has better reviews, Pocket Slide Rule Expert or Bode Plot Calculator?
Bode Plot Calculator is rated higher. Pocket Slide Rule Expert averages 4.8 out of 5 from 4 ratings, while Bode Plot Calculator averages 5.0 from 1 ratings.
Do Pocket Slide Rule Expert or Bode Plot Calculator have ads?
Neither Pocket Slide Rule Expert nor Bode Plot Calculator shows ads.
Which is updated more often, Pocket Slide Rule Expert or Bode Plot Calculator?
Pocket Slide Rule Expert ships an update every 4 months, and Bode Plot Calculator every 12 months. Most recently, Pocket Slide Rule Expert was updated on September 21, 2026 and Bode Plot Calculator on October 8, 2026.

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