Attenuator vs LED Calc.
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
LED Calc.
This application assists in designing electronic circuits by calculating the necessary resistor values for LEDs. It simplifies the process of determining the correct components for your LED projects.
- Resistor value calculation
- LED circuit design assistance
- Component value determination
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This app calculates the value of resistor, when designing a circuit using LED.
Screenshots
Verdict
The clearest difference is review sentiment: Attenuator at 100% against LED Calc.'s 50%. Attenuator also leads on rating (5.0 vs 1.0) and ads (none vs shown). LED Calc.'s advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 17.6). On price, update cadence 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
Both are free to download. Attenuator sells 1 one-off in-app purchase. LED Calc. asks for nothing beyond the download.
Attenuator holds the better App Store score, 5.0 against 1.0. 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. Written reviews point the same way: 100% of Attenuator's written reviews are positive against 50% of LED Calc.'s.
Attenuator ships an update every 7 months, LED Calc. every 10 months. The most recent releases landed on July 29, 2026 and June 5, 2026 respectively.
| Parameter | Attenuator | LED Calc. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 7 months — better | Every 10 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Tim E. Burrow | Jibiki Works |
Customer experience
Attenuator
LED Calc.
In-app purchases
Attenuator
- Remove all ads$1.99
LED Calc.
No in-app purchases
Questions
Is Attenuator free?
Is LED Calc. free?
Which has better reviews, Attenuator or LED Calc.?
Do Attenuator or LED Calc. have ads?
Which is updated more often, Attenuator or LED Calc.?
Other comparisons
