Attenuator vs RF Slide Rule
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
RF Slide Rule
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A simple RF Tool to calculate: - Free Space loss - RSSI - Pathloss - EIRP for a given RF link taking as inputs: - Frequency (GHz) - Distance (km or mi) - Tx and Rx Antenna gains - Rx Sensitivity - Tx Power This App should be periodically updated to incorporate additional useful RF and Telecom engineering formulas.
Screenshots
Verdict
The clearest difference is in-app purchases: RF Slide Rule at none against Attenuator's 1. RF Slide Rule also leads on update cadence (weekly vs every 7 months) and device support (3 vs 1). On price 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. RF Slide Rule asks for nothing beyond the download.
Attenuator ships an update every 7 months, RF Slide Rule weekly. The most recent releases landed on September 14, 2026 and September 10, 2026 respectively.
| Parameter | Attenuator | RF Slide Rule |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 7 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 7.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Tim E. Burrow | CEC, S.A. |
In-app purchases
Attenuator
- Remove all ads$1.99
RF Slide Rule
No in-app purchases
