Refrigerant Identifier vs USCIS Civic Test
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Refrigerant Identifier
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This new OzonAction video series consists of short instructional videos showing how to use and maintain a refrigerant identifier. The videos provide useful guidance on safety and best practice, understanding the difference between different identifier units, testing procedures and identification of results. It is intended for use by Montreal Protocol National Ozone Officers, Customs and Enforcement Officers as well as technicians involved in the servicing and maintenance of refrigeration and air-conditioning systems. The videos were produced by UN Environment Programme OzonAction in collaboration with Neutronics, Inc. and Unicorn B.V.
USCIS Civic Test
Prepare for your U.S. citizenship interview with flashcards, quizzes, and mock interviews covering all 128 official civics questions. Includes audio, progress tracking, and helpful tips for test day. Works offline and offers a free version with 50 questions.
- 128 official civics questions
- Flashcard study mode
- Multiple choice quizzes
- Mock interview practice
- Audio for questions and answers
- Progress tracking
- Offline functionality
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Preparing for your U.S. citizenship interview? USCIS Civic Test is the easiest way to study all 128 civics questions from the official 2025 USCIS naturalization test. STUDY YOUR WAY - Flashcards: Flip through questions and answers at your own pace - Multiple Choice: Practice with 4-option quizzes that feel like the real test - Mock Interview: Practice the real oral exam — answer aloud, self-assess, officer stops at 12 - Audio: Every question and answer read aloud by a natural-sounding voice KNOW WHAT TO EXPECT - Step-by-step interview day guide - Helpful tips from real test experiences - The 10 most commonly asked questions highlighted TRACK YOUR PROGRESS - Mark questions as learned - Filter by category: U.S. Government, Rights & Responsibilities, U.S. History - Focus on unlearned questions only MATCHES THE REAL TEST - All 128 questions from the official 2025 USCIS civic test - Practice quizzes: 20 questions, need 12 correct to pass - Works offline — no internet needed Free version includes 50 questions. Upgrade to Pro for just $2.99 to unlock all 128 questions. One-time purchase — no subscriptions. Good luck on your citizenship journey!
Screenshots
Verdict
The clearest difference is in-app purchases: Refrigerant Identifier at none against USCIS Civic Test's 1. Refrigerant Identifier also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.1). On price 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
Both are free to download. USCIS Civic Test sells 1 one-off in-app purchase. Refrigerant Identifier asks for nothing beyond the download.
| Parameter | Refrigerant Identifier | USCIS Civic Test |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (43 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 43 — better |
| Update frequency | — | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 22 MB | 69 MB |
| Age rating | 17+ | 4+ |
| Developer | UNEP | Hakan karadis |
In-app purchases
Refrigerant Identifier
No in-app purchases
USCIS Civic Test
- USCIS Civic Test Pro$2.99
Questions
Is Refrigerant Identifier free?
Is USCIS Civic Test free?
Do Refrigerant Identifier or USCIS Civic Test have ads?
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