Comparison

Mobile SOS vs Knot Not

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

Head to head

Awareness to harmony

About

Mobile SOS

Features

Read full description

The Mobile SOS app provides victims of domestic violence, sexual assault, stalking, and human trafficking the ability to confidentially contact an SOS advocate in Emporia, Kansas. The app also displays the organization web and social media content.

About

Knot Not

Features

Read full description

Knot Not is your personal relationship tracker designed to help you log and monitor conflicts with your partner, friends, or loved ones. With a simple calendar interface, mark fights or disagreements, note details like intensity and context, and gain insights to foster healthier connections. Key Features: Easy Conflict Logging: Quickly add or toggle conflicts on any date, with options for notes, and intensity levels (minor, moderate, severe). Visual Calendar View: See your month at a glance with emoji indicators for conflicts and color-coded intensities – spot patterns and trends effortlessly. Private & Secure: All data is stored locally for complete privacy

Screenshots

Mobile SOS3 screens

Knot Not4 screens

Verdict

The call

The clearest difference is in-app purchases: Mobile SOS at none against Knot Not's 1. Mobile SOS also leads on iOS requirement (13.0 vs 17.6). Knot Not's advantage is update cadence (every 6 months vs every 44 months). On price, ads and device support 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. Knot Not sells 1 one-off in-app purchase. Mobile SOS asks for nothing beyond the download.

UpkeepUpdate frequency

Mobile SOS ships an update every 44 months, Knot Not every 6 months. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 3 level

Mobile SOS versus Knot Not: the parameters behind the verdict, then further details
Parameter	Mobile SOS	Knot Not
Price	Free	Free
Update frequency	Every 44 months	Every 6 months — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPod	iPhone, iPad
Requires iOS	13.0 — better	17.6
Further details — not scored
Size	36 MB	6 MB
Age rating	4+	4+
Developer	SOS, Inc.	ZHENGZE PEI

In-app purchases

None

Mobile SOS

No in-app purchases

1 purchases

Knot Not

One-time1

Knotnot Premium$1.99

Questions

Is Mobile SOS free?

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

Is Knot Not free?

Knot Not is free to download, with in-app purchases available.

Do Mobile SOS or Knot Not have ads?

Neither Mobile SOS nor Knot Not shows ads.

Which is updated more often, Mobile SOS or Knot Not?

Mobile SOS ships an update every 44 months, and Knot Not every 6 months. Most recently, Mobile SOS was updated on October 13, 2026 and Knot Not on October 14, 2026.