# Geo Proximity Alarm vs Decibel Reader

The clearest difference is review sentiment: Decibel Reader at 80% against Geo Proximity Alarm's 0%. Decibel Reader also leads on price (Free vs $0.99) and rating (4.5 vs 1.0). Geo Proximity Alarm's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support there is nothing between them.

Decibel Reader is free to download; Geo Proximity Alarm costs $0.99 up front. Decibel Reader sells 6 in-app purchases, starting at $3.99 per 7 days. Geo Proximity Alarm asks for nothing beyond the download.

Decibel Reader holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Decibel Reader has 24 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Geo Proximity Alarm's written reviews are positive against 80% of Decibel Reader's.

Geo Proximity Alarm ships an update every 3 months, Decibel Reader every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Geo Proximity Alarm | Decibel Reader |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/geo-proximity-alarm/id568750147/reviews) | **[4.5 (24 ratings)](https://appshunter.io/ios/app/decibel-reader/id6451411046/reviews)** |
| Number of ratings | 3 | **24** |
| Positive reviews | 0.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 8 MB | 12 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Peter Shevill](https://appshunter.io/developer/467204832) | [Andy Sutanto](https://appshunter.io/developer/1659282966) |

## What reviewers say

### Geo Proximity Alarm

[App page](https://appshunter.io/ios/app/geo-proximity-alarm/id568750147)

This utility app functions as a location-based alarm. Define custom alert zones using various shapes and configure sounds, vibrations, or SMS messages to trigger when you enter or exit these areas.

**Highlights:** Location-based alarms, Customizable alert zones (circular, rectangular, polygon), Configurable sounds and vibrations, Optional SMS notifications, Background operation with notifications, App launch from notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Reader

[App page](https://appshunter.io/ios/app/decibel-reader/id6451411046)

Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.

**Highlights:** Real-time decibel measurement, Calibration for accuracy, Track min, average, and max noise levels, Dark mode for low-light use, Simple and intuitive interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Pro - 1 Week | $3.99 | per 7 days |
| Decibel Meter Pro - 1 Month | $7.99 | per month |
| Sound Level Meter - 6 Months | $19.99 | per 6 months |
| Noise Level Meter - 1 Year | $29.99 | per year |
| Decibel Meter Pro - 1Y 2 | $29.99 | per year |
| dB Meter Pro | $49.99 | one-time |


## Frequently asked questions

### Is Geo Proximity Alarm free?

Geo Proximity Alarm costs $0.99, with no in-app purchases.

### Is Decibel Reader free?

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

### Which has better reviews, Geo Proximity Alarm or Decibel Reader?

Decibel Reader is rated higher. Geo Proximity Alarm averages 1.0 out of 5 from 3 ratings, while Decibel Reader averages 4.5 from 24 ratings.

### Do Geo Proximity Alarm or Decibel Reader have ads?

Decibel Reader shows ads; Geo Proximity Alarm does not.

### Which is updated more often, Geo Proximity Alarm or Decibel Reader?

Geo Proximity Alarm ships an update every 3 months, and Decibel Reader every 2 weeks. Most recently, Geo Proximity Alarm was updated on November 1, 2026 and Decibel Reader on November 3, 2026.

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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.*