Attenuator vs Calculator HD
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
Calculator HD
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- Standard Calculator: Support common addition, subtraction, multiplication, division and other basic operations. - Scientific Calculator: Support trigonometric function, power function, constant calculation and other scientific operations. - History: Supports the history function of the calculator. - Calculation of Area: Circle, triangle and other graph area calculation. - Calculation of Volume: Sphere, cylinder and other geometry area calculation. - Measurement of body shape: The figure is tested according to the body data. - Conversion of units: Conversion of common units such as length and speed.
Screenshots
Verdict
The clearest difference is in-app purchases: Calculator HD at none against Attenuator's 1. Calculator HD also leads on device support (3 vs 1) and iOS requirement (9.0 vs 17.6). On price, 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. Calculator HD asks for nothing beyond the download.
Attenuator ships an update every 7 months, Calculator HD every 6 months. The most recent releases landed on October 18, 2026 and October 27, 2026 respectively.
| Parameter | Attenuator | Calculator HD |
|---|---|---|
| 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 | Every 6 months — 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 | 9.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Tim E. Burrow | Zhuhai Record Yi Technology Co.,Ltd. |
In-app purchases
Attenuator
- Remove all ads$1.99
Calculator HD
No in-app purchases
