Comparison

LINX PTT vs SourceKeeper

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

Head to head
About

LINX PTT

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
Read full description

LINX—Push to Talk, Track & Protect More than Push-to-Talk: LINX turns your smartphone into a PTT handset for secure, enterprise team communication. Want more? You can add GPS and Alert features to power productivity throughout your entire enterprise. Save on radio costs and expand coverage using any carrier or WiFi network.* Highlighted Features: - Instant Push-to-Talk (Group & Private Calls) - Text messaging/file sharing (Group & Private) - User and group call priority - Ad-Hoc groups - Carrier agnostic (use any 3G, 4G LTE, Wi-Fi or private data network connection) - Works on smartphones or LTE radios - Map view with user position via GPS - PC/Browser based Dispatch with reporting capabilities - Emergency alerts - Speeding, geofence, & landmark alerts - Vocal notifications, text messages read aloud - PTT accessory compatibility - Unlimited users & groups - Subscription based cloud & on-premise/private solutions available - Supports radio integration for hybrid LMR system* How it helps you: - Improve team collaboration & efficiency - Reduce communication system costs - Expand coverage beyond radio, link multiple locations - Reduce incident response time - Get up and running out of the box

About

SourceKeeper

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
Read full description

SourceKeeper is the research companion built for students, academics, and anyone who needs properly formatted citations without the headache. Scan a book's barcode and SourceKeeper looks up the title, authors, publisher, and publication details automatically. Photograph a journal article page and it reads the metadata for you. Or skip the scanning entirely and enter sources by hand — whatever fits your workflow. Cite every source type Books, journal articles, book chapters, websites, and newspaper or magazine articles — all formatted correctly in Chicago 17th edition, MLA 9th edition, or APA 7th edition. Stay organized by project Create a project for each paper, chapter, or course. Your sources stay grouped, your bibliography stays clean. Export in one tap Generate a formatted bibliography or footnote list for any project, or a master bibliography across all your projects. Export as RTF and open directly in Word, Pages, or Google Docs — italics and formatting intact. Built for real research Citations follow current style guide rules for author formatting, title case, volume and issue numbers, DOIs, edited volumes, and more. Footnote and bibliography formats are both generated for every source. Make it yours Four built-in themes — Academia, Midnight, Botanical, and Slate — plus full color pickers for accent, background, and card colors. Adjust button shape from square to fully rounded.

Screenshots

LINX PTT4 screens
SourceKeeper3 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
LINX PTT versus SourceKeeper: the parameters behind the verdict, then further details
ParameterLINX PTTSourceKeeper
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better26.2
Further details — not scored
Size64 MB2 MB
Age rating4+4+
DeveloperSafemobileNATHANIEL J MOREHOUSE

Customer experience

LINX PTT

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SourceKeeper

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

LINX PTT

No in-app purchases

2 purchases

SourceKeeper

One-time2
  • ProMode$1.99
  • Pro Mode$1.99

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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