Comparison

Občanka vs Magnetic Field Calc +

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

Head to head
About

Občanka

Features
Read full description

Aplikace občanka slouží k ověření, zda je občanský průkaz evidován v databázi neplatných údajů Ministerstva vnitra ČR. Výsledek ověření má pouze informativní charakter.

About

Magnetic Field Calc +

Calculate magnetic fields from electric currents with four distinct modes. Solve for any variable, visualize with interactive diagrams, and utilize flexible unit support. Works offline for convenience.

Highlights
  • Four calculation modes (Straight Wire, Loop, Solenoid, Toroid)
  • Solve for any variable (field, current, distance, etc.)
  • Interactive 2D diagrams
  • Flexible unit support (A, mA, m, cm, mm, T, µT, Gauss)
  • Built-in reference sheet
  • Save and copy calculations
  • Offline functionality
Features
Read full description

Calculate magnetic fields generated by electric currents with precision and ease. Magnetic Field Calculator is a fast, offline physics tool designed for students, engineers, and science enthusiasts. FOUR CALCULATION MODES • Straight Wire — B = (μ₀ · I) / (2π · r) • Circular Loop — B = (μ₀ · I) / (2 · R) • Solenoid — B = μ₀ · n · I • Toroid — B = (μ₀ · N · I) / (2π · r) SOLVE FOR ANY VARIABLE Not just magnetic field strength — reverse-calculate current (I), distance (r), radius (R), turn density (n), or total turns (N). Select what you want to solve, enter the known values, and get instant results. INTERACTIVE DIAGRAMS Each mode displays a clear 2D diagram showing the wire geometry, field direction, and key variables. Visual learning made simple. FLEXIBLE UNIT SUPPORT • Current: Ampere (A), Milliampere (mA) • Distance: Meter (m), Centimeter (cm), Millimeter (mm) • Magnetic Field: Tesla (T), Microtesla (µT), Gauss All conversions handled automatically with high-precision SI calculations. BUILT-IN REFERENCE Quick-access formula sheet with constants (μ₀), formulas, variable definitions, and unit conversion tables — everything you need in one place. SAVE & REVIEW Save calculations to history for quick reference. Copy results to clipboard with one tap. WORKS OFFLINE No internet connection required. All calculations run locally on your device — fast, private, and reliable. Perfect for physics homework, exam preparation, lab work, electrical engineering projects, or anyone curious about electromagnetism. The magnetic force on a current-carrying wire is perpendicular to both the wire and the magnetic field, with the direction given by the right-hand rule. Magnetic fields arise from charges, similar to electric fields, but are different in that the charges must be moving. A long straight wire carrying a current is the simplest example of a moving charge that generates a magnetic field. The force a charge feels when moving through a magnetic field depends on the right-hand rule. The direction of the magnetic field due to moving charges also depends on the right-hand rule. The direction of the magnetic field is perpendicular to the wire and is in the direction the fingers of the right hand would curl if wrapped around the wire with the thumb in the direction of the current. The strength of the magnetic field depends on the current I in the wire and d, the distance from the wire. Thank you for your support, and feel free to visit nitrio.com for more apps for your iOS devices.

Screenshots

Občanka4 screens
Magnetic Field Calc +4 screens

Verdict

The call

The clearest difference is price: Občanka at Free against Magnetic Field Calc +'s $2.99. Občanka also leads on iOS requirement (8.0 vs 17.6). On ads, in-app purchases 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

Občanka is free to download; Magnetic Field Calc + costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 7 level
Občanka versus Magnetic Field Calc +: the parameters behind the verdict, then further details
ParameterObčankaMagnetic Field Calc +
PriceFree — better$2.99
Rating—4.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Every 27 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better17.6
Further details — not scored
Size37 MB1 MB
Age rating4+4+
DeveloperSkeleton SoftwareNitrio

In-app purchases

None

Občanka

No in-app purchases

None

Magnetic Field Calc +

No in-app purchases

Questions

Is Občanka free?
Občanka is free to download, with no in-app purchases.
Is Magnetic Field Calc + free?
Magnetic Field Calc + costs $2.99, with no in-app purchases.
Do Občanka or Magnetic Field Calc + have ads?
Neither Občanka nor Magnetic Field Calc + shows ads.

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