Comparison

Silent Observer vs Mobile SOS

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

Head to head

Silent Observer

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About

Silent Observer

Features

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Silent Observer provides citizens in Kent County, Michigan a safe and anonymous way to report a crime. Silent Observer is most interested in information about serious crimes that affect the safety and well-being of your neighborhood, community and school. Tips on serious crimes like murder, assault, rape, robbery, weapons, felony warrants, drug dealing, and burglary as well as code of conduct infractions occurring on school grounds is information Silent Observer would like to receive. That information is then sent to police for follow-up and if your tip leads to the arrest, you may be eligible for a reward.

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.

Screenshots

Silent Observer4 screens

Mobile SOS3 screens

Verdict

The call

The clearest difference is iOS requirement: Silent Observer at 9.0 against Mobile SOS's 13.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Silent Observer ships an update every 34 months, Mobile SOS every 44 months. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

Scorecard1 real difference · 5 level

Silent Observer versus Mobile SOS: the parameters behind the verdict, then further details
Parameter	Silent Observer	Mobile SOS
Price	Free	Free
Update frequency	Every 34 months — better	Every 44 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	9.0 — better	13.0
Further details — not scored
Size	30 MB	36 MB
Age rating	4+	4+
Developer	Navigate360, LLC	SOS, Inc.

In-app purchases

None

Silent Observer

No in-app purchases

None

Mobile SOS

No in-app purchases

Questions

Is Silent Observer free?

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

Is Mobile SOS free?

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

Do Silent Observer or Mobile SOS have ads?

Neither Silent Observer nor Mobile SOS shows ads.

Which is updated more often, Silent Observer or Mobile SOS?

Silent Observer ships an update every 34 months, and Mobile SOS every 44 months. Most recently, Silent Observer was updated on October 4, 2026 and Mobile SOS on October 13, 2026.