Comparison

Letterbox Check vs Synapse FGH Security

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

Head to head

About

Letterbox Check

Features

Read full description

Achieve higher confidence with the Letterbox Check App, GPS-tracking and intelligent missed property reports. Connect with our Web solution to add Digital Maps, Property counts and sophisticated Dashboards to your distribution activities.

About

Synapse FGH Security

Features

Read full description

The Synapse - FGH Security application provides actionable insight through data collation, incident reporting, intelligence gathering and analysis. Streamlining operations by optimising decision making, reducing response times, and improving communications to better protect people, assets, and locations.

Screenshots

Letterbox Check4 screens

Synapse FGH Security4 screens

Verdict

The call

The clearest difference is update cadence: Synapse FGH Security at every 3 months against Letterbox Check's every 12 months. Synapse FGH Security also leads on iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Letterbox Check ships an update every 12 months, Synapse FGH Security every 3 months. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 4 level

Letterbox Check versus Synapse FGH Security: the parameters behind the verdict, then further details
Parameter	Letterbox Check	Synapse FGH Security
Price	Free	Free
Update frequency	Every 12 months	Every 3 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	10.0 — better
Further details — not scored
Size	21 MB	88 MB
Age rating	4+	17+
Developer	Redburst Technologies AB	Zinc Digital

In-app purchases

None

Letterbox Check

No in-app purchases

None

Synapse FGH Security

No in-app purchases

Questions

Is Letterbox Check free?

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

Is Synapse FGH Security free?

Synapse FGH Security is free to download, with no in-app purchases.

Do Letterbox Check or Synapse FGH Security have ads?

Neither Letterbox Check nor Synapse FGH Security shows ads.

Which is updated more often, Letterbox Check or Synapse FGH Security?

Letterbox Check ships an update every 12 months, and Synapse FGH Security every 3 months. Most recently, Letterbox Check was updated on September 28, 2026 and Synapse FGH Security on October 10, 2026.