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calc84online vs Ohmlark

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

calc84online compared with Ohmlark
Detailcalc84online logo calc84onlineOhmlark logo Ohmlark
What it doesFree online Texas Instruments TI 84 Plus CE graphing calculator simulator for algebra, calculus, matrices, and standardized test prep Electronics calculators for makers
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Freemium
PricingNot given Free: $0 forever. Pro Monthly: $4 per month, cancel anytime. Pro Lifetime: $29 one-time payment.
Key features
  • High-resolution color graphing with function plotting and curve rendering
  • Numerical derivatives and definite integrals for calculus
  • Matrix operations and linear system solving with row reduction
  • Statistical regressions and data list analysis
  • Fullscreen mode with keyboard shortcut support
  • TI-30XS MultiView scientific calculator mode
  • Mobile responsive design with touch-friendly buttons
  • Works on Chromebooks, iPads, Mac, Windows, and Linux browsers
  • No installation, account creation, or downloads required
  • Resistor Color Code: read 4, 5 and 6-band resistors or find bands for a value
  • LED Resistor: pick the current-limiting resistor and power rating
  • Voltage Divider: output voltage, loading effect, or solve R2 for target Vout
  • RC Filter: cutoff frequency, time constant and attenuation at any frequency
  • LC Resonance: resonant frequency, characteristic impedance and Q
  • 555 Timer: astable frequency/duty cycle and monostable pulse width
  • Battery Life: runtime from capacity, active/sleep current and duty cycle
  • PCB Trace Width: IPC-2221 trace width for current and temperature rise
  • Electronics Unit Converter: SI prefixes, AWG to mm², mil to mm, dBm to mW, oz copper
What makes it different
  • Completely free with no paywalls, subscriptions, or account requirements
  • Privacy-first architecture: calculations stay on your device, never transmitted to servers
  • Accurate emulation of authentic Texas Instruments hardware syntax and functions
  • Distraction-free learning environment with no ads or pop-ups
  • Real E-series resistor values, not ideal numbers
  • Engineering notation input and result sharing as links
  • No ads, no tracking, no sign-up for free calculators
  • Whole-device BOM costing and battery-life summary in Pro
  • Works on phone at the bench
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)180
Referring domains (Majestic)20

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