# Proximity vs datasurfr

The clearest difference is price: datasurfr at Free against Proximity's $1.99. datasurfr also leads on update cadence (every 2 months vs every 14 months). Proximity's advantage is iOS requirement (12.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

datasurfr is free to download; Proximity costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Proximity ships an update every 14 months, datasurfr every 2 months. The most recent releases landed on October 17, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Proximity | datasurfr |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/proximity-access-card-calc/id774601885/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 29 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [Mitkat Advisory Services pvt.Ltd](https://appshunter.io/developer/1600875467) |

## What reviewers say

### Proximity

[App page](https://appshunter.io/ios/app/proximity-access-card-calc/id774601885)

This utility helps determine the correct number and facility code for access cards or fobs. It converts binary or hexadecimal card values into usable data, and can also reverse the process by generating binary values from facility codes and card numbers.

**Highlights:** Binary to number conversion, Hexadecimal to number conversion, Number to binary generation, Supports multiple bit lengths, Supports numerous card formats, Reverse calculation functionality

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

**In-app purchases:** none


### datasurfr

[App page](https://appshunter.io/ios/app/datasurfr/id6740094424)

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

**In-app purchases:** none


## Frequently asked questions

### Is Proximity free?

Proximity costs $1.99, with no in-app purchases.

### Is datasurfr free?

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

### Do Proximity or datasurfr have ads?

Neither Proximity nor datasurfr shows ads.

### Which is updated more often, Proximity or datasurfr?

Proximity ships an update every 14 months, and datasurfr every 2 months. Most recently, Proximity was updated on October 17, 2026 and datasurfr on October 28, 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.*