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Rooofread vs Ohmlark

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

Rooofread compared with Ohmlark
Detail RooofreadOhmlark logo Ohmlark
What it doesFree Canadian housing calculators and Excel templates to compare real costs, commutes and neighbourhood trade-offs Electronics calculators for makers
StageNot given Not given
FoundedNot given Not given
Based inCA 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
  • Online calculators that show the full costs of housing beyond mortgage or rent
  • Compare two locations by household costs and commuting time
  • Rent vs buy comparison over time
  • Five-year financial projection tool
  • Free downloadable Excel templates for housing planning
  • Calculator inputs saved in browser session
  • All calculations show assumptions for verification
  • 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
  • Educational models with transparent assumptions that users can modify and verify
  • Combines calculators with explanatory articles backed by primary sources
  • Treats renters as permanent audience, not future buyers
  • All tools and templates completely free with no paywall
  • 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)10
Citation Flow (Majestic)170
Referring domains (Majestic)20

4 details filled in for both companies.

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