Comparison

splotRF vs RF toolbox

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

Head to head
About

splotRF

Visualize and analyze touchstone S-parameter data with interactive plots. Supports multiple file overlays, stability calculations, and various matrix conversions. Export data in vector graphics formats.

Highlights
  • Plot .snp format S-parameter data
  • Stability circles and µ/µ' analysis
  • Overlay multiple trace data
  • View data as a table
  • S/Y/Z matrix conversion
  • Smith Chart, Polar, and Rectangular plots
  • Export to PDF
Read full description

Key Features: • plots .snp format s-parameter touchstone data • stability circles for load and source • µ and µ' for load and source stability • interactive data markers • overlay multiple trace data on a single plot • overlay trace data from multiple files • view data as a table list • arbitrary number of ports (.s1p, .s2p, s3p…snp support) • S/Y/Z matrix conversion • mA/RI/dB formatting • interpolation over frequency • exports vector graphics to .pdf • plotting display properties and configuration are saved within file comments • automated grid layout • Smith Chart, Polar and Rectangular plots • reads and plots .zip archives containing s-parameter data

About

RF toolbox

Features
Read full description

RF Toolbox — All-in-One RF Engineering Calculator & Design Suite RF Toolbox is a practical, field-ready app built for RF engineers, students, and radio hobbyists who need fast, reliable calculations and design utilities in one place. From impedance matching and transmission line work to filter and attenuator synthesis, RF Toolbox helps you move from idea to implementation with less friction. KEY FEATURES Impedance & S-Parameter Tools • Smith Chart utilities for impedance visualization and matching workflows • S11 parameter / reflection analysis support • Reflection coefficient and VSWR calculators Matching Networks • L, Pi (π), and T matching network calculators • Stub tuner tools for transmission-line matching • Filters (Passive & RF) • RC and RL passive filter calculators • LC low-pass prototypes: Butterworth and Chebyshev (up to 8th order) • Microstrip filters: band-pass and band-reject (notch) • RLC Networks • RLC series and parallel calculators for resonance and frequency behavior Attenuators • Pi (π), T, and Bridge-T attenuator calculators for common RF pad designs • Cascaded Networks • Cascaded network calculations for chained RF blocks and stages Antenna & Propagation • Antenna design utilities (core RF design helpers) • Path loss calculators • Friis link budget calculator • Power density calculator • Radar maximum range calculator Component Toolkits • Inductor design: air-core, spiral, and multi-layer air-core • Resistors: SMD code, color code, and series/parallel network calculator • Capacitors: SMD code and series/parallel network calculator DESIGNED FOR SPEED AND ACCURACY RF Toolbox is organized for quick access—open the tool you need, enter values, and get results immediately. Whether you’re prototyping a matching network, checking VSWR, sizing an attenuator, or running a quick link budget, RF Toolbox keeps your workflow efficient. Download RF Toolbox and keep essential RF design tools in your pocket.

Screenshots

splotRF3 screens
RF toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: splotRF at none against RF toolbox's 1. splotRF also leads on update cadence (every 10 days vs every 6 months). RF toolbox's advantage is iOS requirement (13.0 vs 18.0). On price, ads 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

Both are free to download. RF toolbox sells 1 one-off in-app purchase. splotRF asks for nothing beyond the download.

UpkeepUpdate frequency

splotRF ships an update every 10 days, RF toolbox every 6 months. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

Scorecard3 real differences · 6 level
splotRF versus RF toolbox: the parameters behind the verdict, then further details
ParametersplotRFRF toolbox
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 10 days — betterEvery 6 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.013.0 — better
Further details — not scored
Size6 MB28 MB
Age rating4+4+
DeveloperDirectRFAnas Abubakar

In-app purchases

None

splotRF

No in-app purchases

1 purchases

RF toolbox

One-time1
  • upgrade to pro$3.99

Questions

Is splotRF free?
splotRF is free to download, with no in-app purchases.
Is RF toolbox free?
RF toolbox is free to download, with in-app purchases available.
Do splotRF or RF toolbox have ads?
Neither splotRF nor RF toolbox shows ads.
Which is updated more often, splotRF or RF toolbox?
splotRF ships an update every 10 days, and RF toolbox every 6 months. Most recently, splotRF was updated on September 10, 2026 and RF toolbox on September 9, 2026.

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