Comparison

US Cop vs Subtraction Math Trainer

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

Head to head
About

US Cop

This app provides law enforcement officers with a comprehensive digital resource library. It includes accident investigation tools, training articles on various police procedures, a pill and drug identifier, extensive case law summaries, and news feeds. It also features tools for evidence documentation and a work calendar.

Highlights
  • Accident investigation formulas and calculators
  • Training articles on detection and interrogation
  • Pill and drug identification tools
  • Extensive case law summaries
  • Evidence photo timestamping with GPS
  • Integrated work calendar
Features
Read full description

US Cop is an independent, offline directory of a deliberately limited set of current nationwide federal law-enforcement contacts. This edition includes source-attributed contacts for the FBI, DEA, ATF, U.S. Marshals Service, and U.S. Postal Inspection Service. Each record shows its official source and verification date. Search works offline, and important values can be copied. Phone, Maps, Mail, and Safari open only after you choose and confirm an available action. The directory is intentionally conservative. It is not a complete directory of federal, state, local, tribal, or territorial agencies. Contact details can change after verification; confirm important information directly with the agency. US Cop is independent and unofficial. It is not affiliated with or endorsed by any government or law-enforcement agency. It is not for emergencies. In the United States, call 911. Privacy: no account or cross-app tracking. Version 4.2.1 sends first-party analytics events for installation, Apple Search Ads attribution, access checks (including diagnostic information about whether the App Store purchase record could be confirmed), and verified subscription purchases. They include device identifiers; device, app, and locale metadata; and purchase details such as transaction IDs, product, dates, and the App Store receipt. Our analytics server also stores the IP address and an approximate location based on it. See the privacy policy for details. Analytics problems never change your access to the directory. US Cop is free to download. Full access to the directory needs a US Cop Weekly subscription. If you bought US Cop before it became free, you keep full access without subscribing. US Cop Weekly: $4.99 per week in the U.S. (other storefronts show the local price). Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically every week until you cancel. Cancel anytime in Settings > your name > Subscriptions at least 24 hours before the renewal date to avoid the next charge. No free trial. Terms of Use: https://beforeafter.appholdings.org/terms/us-cop-ios.html Privacy Policy: https://beforeafter.appholdings.org/privacy/us-cop-ios.html

About

Subtraction Math Trainer

Features
Read full description

Subtraction Math Trainer is a math learning app designed to help you to practice subtraction. The built-in handwriting recognition allows you to draw answers directly on the screen. Comes with a number of simple mini-games to make learning more effective and less boring. You can practice the following math skills: Subtraction facts - numbers up to 10 Subtraction facts - numbers up to 18 Subtract a multiple of ten Relate addition and subtraction Subtraction facts - numbers up to 20 Subtract a one-digit number from a two-digit number Subtract two two-digit numbers Subtract multiples of 10 Subtract multiples of 100 Subtract multiples of 10 or 100 Balance subtraction equations Subtraction facts - numbers up to 100 Subtract two three-digit numbers Complete the subtraction sentence up to three digits Subtract numbers with four or five digits Balance subtraction equations up to three digits

Screenshots

US Cop4 screens
Subtraction Math Trainer4 screens

Verdict

The call

The clearest difference is price: US Cop at Free against Subtraction Math Trainer's $2.99. US Cop also leads on update cadence (every 6 weeks vs every 34 months). Subtraction Math Trainer's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On 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

US Cop is free to download; Subtraction Math Trainer costs $2.99 up front. US Cop sells 1 in-app purchase, starting at $4.99 per 7 days. Subtraction Math Trainer asks for nothing beyond the download.

UpkeepUpdate frequency

US Cop ships an update every 6 weeks, Subtraction Math Trainer every 34 months. The most recent releases landed on November 10, 2026 and November 11, 2026 respectively.

Scorecard5 real differences · 5 level
US Cop versus Subtraction Math Trainer: the parameters behind the verdict, then further details
ParameterUS CopSubtraction Math Trainer
PriceFree — better$2.99
Rating2.4 (196 ratings) — better—
Positive reviews28.6% of reviews—
Number of ratings196 — better—
Update frequencyEvery 6 weeks — betterEvery 34 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.012.0 — better
Further details — not scored
Size3 MB18 MB
Age rating12+4+
DeveloperApp HoldingsSergey Malugin

Bugs and requests

US Cop

Reported bugs

9 issues
  • App redirects to web hosting page
  • Menu redirects to parked ad page
  • Ad pops up and blocks usage
  • App doesn't work on iOS
  • Sample reports PDFs not found
Show 4 more
  • Domain invalid message
  • Pill imprint ID URL not found
  • Voice recorder not working on iPhone
  • Certain functions crash

Requested features

5 requests
  • Update app for current law
  • Add hazmat placard ID
  • Add counter terrorism section
  • Incorporate department PDFs/SOPs
  • Modernize layout

Subtraction Math Trainer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

US Cop

Subscriptions1
  • US Cop Weekly$4.997 Days
None

Subtraction Math Trainer

No in-app purchases

Questions

Is US Cop free?
US Cop is free to download, with in-app purchases available.
Is Subtraction Math Trainer free?
Subtraction Math Trainer costs $2.99, with no in-app purchases.
Do US Cop or Subtraction Math Trainer have ads?
Neither US Cop nor Subtraction Math Trainer shows ads.
Which is updated more often, US Cop or Subtraction Math Trainer?
US Cop ships an update every 6 weeks, and Subtraction Math Trainer every 34 months. Most recently, US Cop was updated on November 10, 2026 and Subtraction Math Trainer on November 11, 2026.

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