Comparison

Attenuator vs Unit Converter

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

Head to head
About

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.

Highlights
  • 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
Read full description

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

About

Unit Converter

This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.

Highlights
  • 18 unit categories
  • Over 100 units supported
  • Ad-free experience
  • Supports multiple devices
  • Pro version with free trial
Read full description

Support 18 categories of units, convert over 100+ units: - Angle: Degrees, Radians, Grad, Arcseconds, Arcminutes, Revolutions - Area: Mm², Square Kilometers, Square Meters, Square Centimeters, Mm², Μm², Nm², Square Inches, Square Feet, Square Yards, Square Miles, Acres, Ares, Hectares - Base: Binary, Octal, Decimal, Hexadecimal - Digital Storage: Bits, Bytes, Mib, Gib, Tib, Pib, Megabytes, Gigabytes, Terabytes, Petabytes - Electric Charge: C, Mah, Kah, Ah, Mah, Μah - Electric Potential Difference: Mv, Kv, Volts, Mv, Μv - Electric Resistance: Mω, Kω, Ohms, Mω, Μω - Energy: Kilojoules, Joules, Kilocalories, Calories, Kilowatt-Hours - Frequency: Thz, Gigahertz, Megahertz, Kilohertz, Hertz, Mhz, Μhz, Nhz - Fuel Efficiency: Liters Per 100 Kilometers, Miles Per Gallon, Miles Per Imp. Gallon - Length: Millimeters, Centimeters, Decimeters, Meters, Kilometers, Light Years, Inches, Feet, Yards, Miles - Mass: Kilograms, Grams, Dg, Cg, Milligrams, Micrograms, Ng, Pg, Ounces, Pounds, Stones, Metric Tons, Tons, Carats, Troy Ounces, Slug - Power: Tw, Gigawatts, Megawatts, Kilowatts, Watts, Milliwatts, Μw, Nw, Pw, Fw, Horsepower - Pressure: N/M², Gpa, Mpa, Kpa, Hectopascals, Inches Of Mercury, Bar, Millibars, Millimeters Of Mercury, Pounds-Force Per Square Inch - Speed: Kilometers Per Hour, Meters Per Second, Knots - Temperature: Degrees Celsius, Degrees Fahrenheit, Kelvins - Time (Duration): Milliseconds, Seconds, Minutes, Hours, Days, Weeks, Months, Years, Decade, Century - Volume: Megaliters, Kl, Liters, Deciliters, Centiliters, Milliliters, Cubic Kilometers, Cubic Meters, Dm³, Mm³, Cubic Inches, Cubic Feet, Cubic Miles Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Attenuator4 screens
Unit Converter4 screens

Verdict

The call

The clearest difference is update cadence: Unit Converter at every 9 days against Attenuator's every 7 months. Unit Converter also leads on device support (5 vs 1) and iOS requirement (15.0 vs 17.6). On price, rating, review sentiment and ratings volume 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. Attenuator sells 1 one-off in-app purchase and Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Attenuator against 4.9 for Unit Converter. Both are backed by a comparable volume of ratings — 8 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Attenuator ships an update every 7 months, Unit Converter every 9 days. The most recent releases landed on July 29, 2026 and June 10, 2026 respectively.

Scorecard3 real differences · 7 level
Attenuator versus Unit Converter: the parameters behind the verdict, then further details
ParameterAttenuatorUnit Converter
PriceFreeFree
Rating5.0 (8 ratings) — better4.9 (17 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings817 — better
Update frequencyEvery 7 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPad, iPod, Mac, Vision Pro — better
Requires iOS17.615.0 — better
Further details — not scored
Size1 MB15 MB
Age rating4+4+
DeveloperTim E. BurrowZIJIAN CHEN

Customer experience

Attenuator

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Unit Converter

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Attenuator

One-time1
  • Remove all ads$1.99
4 purchases

Unit Converter

Subscriptions1
  • Pro Version (1 Month)14 Days trial$0.991 Month
One-time3
  • 1 cup of orange juice.$0.99
  • 1 litre of orange juice.$2.99
  • Pro Version (Lifetime)$3.99

Questions

Is Attenuator free?
Attenuator is free to download, with in-app purchases available.
Is Unit Converter free?
Unit Converter is free to download, with in-app purchases available.
Which has better reviews, Attenuator or Unit Converter?
Attenuator is rated higher. Attenuator averages 5.0 out of 5 from 8 ratings, while Unit Converter averages 4.9 from 17 ratings.
Do Attenuator or Unit Converter have ads?
Neither Attenuator nor Unit Converter shows ads.
Which is updated more often, Attenuator or Unit Converter?
Attenuator ships an update every 7 months, and Unit Converter every 9 days. Most recently, Attenuator was updated on July 29, 2026 and Unit Converter on June 10, 2026.

Other comparisons