# LINX PTT vs SourceKeeper

The clearest difference is in-app purchases: LINX PTT at none against SourceKeeper's 2. LINX PTT also leads on iOS requirement (13.0 vs 26.2). SourceKeeper's advantage is update cadence (every 9 days vs every 3 weeks). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. SourceKeeper sells 2 one-off in-app purchases. LINX PTT asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for LINX PTT against 5.0 for SourceKeeper. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

LINX PTT ships an update every 3 weeks, SourceKeeper every 9 days. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | LINX PTT | SourceKeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/linx-ptt/id1448018810/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sourcekeeper/id6762437054/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | Free |
| Size | 64 MB | 2 MB |
| Requires iOS | **13.0** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Safemobile](https://appshunter.io/developer/1441296486) | [NATHANIEL J MOREHOUSE](https://appshunter.io/developer/1889388056) |

## What reviewers say

### LINX PTT

[App page](https://appshunter.io/ios/app/linx-ptt/id1448018810)

This app transforms your smartphone into a secure communication device for teams, offering instant push-to-talk, text messaging, and file sharing. It enhances productivity with GPS tracking, emergency alerts, and dispatch capabilities, while reducing traditional radio costs.

**Highlights:** Instant Push-to-Talk (Group & Private), Text messaging/file sharing, GPS user position tracking, Emergency alerts & geofencing, PC/Browser based dispatch, Carrier agnostic communication

**In-app purchases:** none


### SourceKeeper

[App page](https://appshunter.io/ios/app/sourcekeeper/id6762437054)

Effortlessly create properly formatted citations for various source types. Organize your research by project and export bibliographies or footnotes directly to your word processor. Customize the app's appearance with multiple themes and color options.

**Highlights:** Automated source scanning (barcode, photo), Manual source entry, Supports Chicago, MLA, and APA styles, Organize sources by project, Export bibliographies and footnotes, Customizable themes and colors

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ProMode | $1.99 | one-time |
| Pro Mode | $1.99 | one-time |


## Frequently asked questions

### Is LINX PTT free?

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

### Is SourceKeeper free?

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

### Which has better reviews, LINX PTT or SourceKeeper?

LINX PTT and SourceKeeper are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do LINX PTT or SourceKeeper have ads?

Neither LINX PTT nor SourceKeeper shows ads.

### Which is updated more often, LINX PTT or SourceKeeper?

LINX PTT ships an update every 3 weeks, and SourceKeeper every 9 days. Most recently, LINX PTT was updated on October 3, 2026 and SourceKeeper on October 14, 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.*