# Attenuator vs MapPinNote

The clearest difference is in-app purchases: MapPinNote at none against Attenuator's 1. MapPinNote also leads on iOS requirement (11.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Attenuator sells 1 one-off in-app purchase. MapPinNote asks for nothing beyond the download.

## The numbers

| Metric | Attenuator | MapPinNote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/attenuator/id367216554/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 25 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tim E. Burrow](https://appshunter.io/developer/367216557) | [Kin Wai Ho](https://appshunter.io/developer/1596060690) |

## What reviewers say

### Attenuator

[App page](https://appshunter.io/ios/app/attenuator/id367216554)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all ads | $1.99 | one-time |


### MapPinNote

[App page](https://appshunter.io/ios/app/mappinnote/id1608160112)

**In-app purchases:** none


## Frequently asked questions

### Is Attenuator free?

Attenuator is free to download, with in-app purchases available.

### Is MapPinNote free?

MapPinNote is free to download, with no in-app purchases.

### Do Attenuator or MapPinNote have ads?

Neither Attenuator nor MapPinNote shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*