Attenuator vs SatRadio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Attenuator
Calculate output voltage, power, and attenuation based on input values and dB of attenuation. Features NMR-specific calculations for pulses and measures local magnetic fields and barometric pressure.
- Calculate output voltage and power
- Specify input voltage (Vpp or Vrms)
- Calculate attenuation in dB
- NMR pulse calculations
- Measure local magnetic field
- Display barometric pressure
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Attenuator is a utility for anyone working with radio frequency sources and needs to know power and voltage after attenuation. You can specify an input voltage (Vpp or Vrms) and dB of attenuation to get the output voltage, power and attenuation. The impedance can be specified, typically 50Ω for most systems. There is a new emphasis on NMR utility, with options for calculating pulses based on reference power and pulse length. Powers are in Watts, dBm, and dB values. Measure local magnetic field to check stray static fields from magnets. See the local barometric pressure, useful if the magnet boil-off is high
SatRadio
This app provides essential tools for radio and satellite communication engineers. It includes calculators and analysis features for antenna parameters, frequency calculations, link budgets, and modem performance. It also offers miscellaneous utilities for RF engineering tasks.
- Dish antenna analysis (axial ratio, gain, line of sight)
- Frequency calculations (phase noise, doppler, wavelength)
- Radio link analysis (coaxial losses, mismatch losses, EIRP)
- Modem performance metrics (C/N, C/I, PER, BER)
- Miscellaneous RF engineering utilities (dB calculator, converters)
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Some tools often needed in radio & satcom engineering : - dish antenna : axial ratio, gain from X/Y apertures, line of sight mask, radiation pattern, factor of merit G/T, main lobe aperture, off-axis radiation, temperature, wind deflection - frequency : phase noise, doppler, phase modulation index, wave length - links : on-axis radiation, coaxial losses, individual radio link, mismatch losses, on-axis transmitter EIRP link, waveguide, optical fibers - modem : C/N & C/I, PER & BER, phase noise contribution, PSK waveform - miscellaneous : AM & PM, cooling, dB & %, dB calculator, degrees converter, electrical field, heading & distance, graceful degradation, group delay, IM3-IP3-NPR, power conversion, RF link availability, noise factor
Screenshots
Verdict
The clearest difference is in-app purchases: SatRadio at none against Attenuator's 1. SatRadio also leads on device support (3 vs 1) and iOS requirement (12.4 vs 17.6). Attenuator's advantage is ratings volume (8 vs 1). On price, rating, update cadence and ads 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
Both are free to download. Attenuator sells 1 one-off in-app purchase. SatRadio asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Attenuator against 5.0 for SatRadio. That said, the two scores are not equally well evidenced: Attenuator has 8 ratings behind it against 1, so its average is the more settled of the two.
Attenuator ships an update every 7 months, SatRadio every 10 months. The most recent releases landed on July 29, 2026 and June 3, 2026 respectively.
| Parameter | Attenuator | SatRadio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 7 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 12.4 — better |
| Further details — not scored | ||
| Size | 1 MB | 8 MB |
| Age rating | 4+ | 17+ |
| Developer | Tim E. Burrow | Dioptase |
Customer experience
Attenuator
SatRadio
In-app purchases
Attenuator
- Remove all ads$1.99
SatRadio
No in-app purchases
