US Cop vs GRE Math Knight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
GRE Math Knight
Practice GRE math concepts by battling monsters. This game covers arithmetic, algebra, geometry, and data analysis, with formula scrolls and mini-games to enhance learning. Become a GRE math knight and save the kingdom.
- GRE math concept practice
- Arithmetic, algebra, geometry, data analysis
- Formula scrolls
- Mini-games
- Monster battling gameplay
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Our kingdom is held hostage by evil monsters whose only weakness is GRE math! Free to start: play the Swamp and Training free, then unlock the Desert, Plains and Tundra with a one-time purchase. No subscription, no ads. In GRE Math Knight, you'll hone your math skills by practicing the most commonly tested GRE math concepts. First, build your skills on the training ground, where you can drill the basics like mental math, fractions, percents, and more, then travel to four different biomes to solve arithmetic, algebra, geometry, and data analysis GRE math questions in order to defeat the monsters. You'll find scrolls with math formulas along the way to aid you in your quest, and fun games to play to break up your studying. Can you save the kingdom and become a true GRE math knight?
Screenshots
Verdict
The clearest difference is rating: GRE Math Knight at 4.5 against US Cop's 2.4. GRE Math Knight also leads on in-app purchases (none vs 1) and review sentiment (53% vs 29%). US Cop's advantage is ratings volume (196 vs 53). On price, update cadence 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
Both are free to download. US Cop sells 1 in-app purchase, starting at $4.99 per 7 days. GRE Math Knight asks for nothing beyond the download.
GRE Math Knight holds the better App Store score, 4.5 against 2.4. Both are backed by a comparable volume of ratings — 196 and 53 respectively. Written reviews point the same way: 29% of US Cop's written reviews are positive against 53% of GRE Math Knight's.
US Cop ships an update every 6 weeks, GRE Math Knight monthly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | US Cop | GRE Math Knight |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (196 ratings) | 4.5 (53 ratings) — better |
| Positive reviews | 28.6% of reviews | 53.3% of reviews — better |
| Number of ratings | 196 — better | 53 |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 133 MB |
| Age rating | 12+ | 9+ |
| Developer | App Holdings | Vince Kotchian Test Prep |
Customer experience
US Cop
GRE Math Knight
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
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- 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
GRE Math Knight
Not enough reviews yet to summarise bugs or requests.
In-app purchases
US Cop
- US Cop Weekly$4.997 Days
GRE Math Knight
No in-app purchases
Questions
Is US Cop free?
Is GRE Math Knight free?
Which has better reviews, US Cop or GRE Math Knight?
Do US Cop or GRE Math Knight have ads?
Which is updated more often, US Cop or GRE Math Knight?
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