Comparison

AP Environmental Science vs Trigonometry Identities Proofs

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

Head to head
About

AP Environmental Science

Prepare for your AP Environmental Science exam with 500 practice questions covering all topics. Utilize study, timed exam, and bookmark modes to track progress and review effectively. Access all content with a subscription.

Highlights
  • 500 AP-style practice questions
  • Concise answer explanations
  • Study, Timed Exam, and Bookmark modes
  • Progress tracking
  • iCloud save functionality
  • Interactive features
Features
Read full description

500 Ways to Achieve your Highest Score From Atmospheric Conditions and Soil Dynamics to Pollution Types, Alternative and Renewable Energies, and Global Change and Economics, there is a lot of subject matter to know if you want to succeed on your AP Environmental Science exam. That’s why we’ve selected these 500 AP-style questions and answers that cover all topics found on this exam. The targeted questions will prepare you for what you’ll see on test day, help you study more effectively, and use your review time wisely to achieve your best score. Each question includes a concise, easy-to-follow explanation in the answer key. You can use these questions to supplement your overall AP Environmental Science preparation or run them shortly before the test. Either way, 5 Steps to a 5 500 Environmental Science Questions will get you closer to achieving the score you want on test day. This free application includes all questions in Chapter 1 - Earth Science (1-33). The remaining 467 questions are available with a subscription. This app has been designed for the iPhone/iPad with interactive features. -Study/Timed Exam/Bookmark modes are available for review. -In the Study mode, check the answers as you tackle the questions. -In the Timed Exam mode, time yourself and review the answers after the time is up. -In the Bookmark mode, review only the questions you have flagged for further study. -File away correctly answered questions after each practice test. -Opt to include questions from previous quizzes. -Store practice test scores to track your progress. -Save your work to the iCloud to access on multiple devices. About the Author Anaxos, Inc. (Austin, TX) has been creating education and reference materials for over fifteen years. Based in Austin, Texas, the company uses writers from across the globe who offer expertise on an array of subjects just as expansive. Expanded Apps Privacy Policy: https://expandedapps.com/privacy-policy/ Expanded Apps Terms of Use: https://expandedapps.com/terms-of-use/

About

Trigonometry Identities Proofs

Learn and practice trigonometric identity proofs with step-by-step solutions. Compare your work to the app's detailed explanations, revealing each step individually.

Highlights
  • 42 trigonometric identity proofs
  • Step-by-step solution reveal
  • Compare your work to app solutions
  • Practice trigonometry
  • Educational math tool
Features
Read full description

This app has 42 Trigonometric Proofs of Identities. Work on your own and then compare your answers to the steps shown in the app for proving the identity. Each step in the app is initially hidden and can be shown by clicking on the + button.

Screenshots

AP Environmental Science4 screens
Trigonometry Identities Proofs4 screens

Verdict

The call

The clearest difference is price: AP Environmental Science at Free against Trigonometry Identities Proofs's $0.99. AP Environmental Science also leads on rating (4.4 vs 1.0) and review sentiment (33% vs 0%). Trigonometry Identities Proofs's advantage is in-app purchases (none vs 7) and iOS requirement (13.0 vs 15.6). On ads 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

AP Environmental Science is free to download; Trigonometry Identities Proofs costs $0.99 up front. AP Environmental Science sells 7 in-app purchases, starting at $5.99 per 7 days. Trigonometry Identities Proofs asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AP Environmental Science holds the better App Store score, 4.4 against 1.0. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 33% of AP Environmental Science's written reviews are positive against 0% of Trigonometry Identities Proofs's.

UpkeepUpdate frequency

AP Environmental Science ships an update every 6 months, Trigonometry Identities Proofs every 32 months. The most recent releases landed on October 15, 2026 and October 29, 2026 respectively.

Scorecard8 real differences · 2 level
AP Environmental Science versus Trigonometry Identities Proofs: the parameters behind the verdict, then further details
ParameterAP Environmental ScienceTrigonometry Identities Proofs
PriceFree — better$0.99
Rating4.4 (7 ratings) — better1.0 (2 ratings)
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings7 — better2
Update frequencyEvery 6 months — betterEvery 32 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size29 MB18 MB
Age rating17+12+
DeveloperExpanded AppsH3Apps LLC

Customer experience

AP Environmental Science

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Trigonometry Identities Proofs

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

7 purchases

AP Environmental Science

Subscriptions6
  • 1 Week$5.997 Days
  • 1 Week$6.997 Days
  • 1 Month$17.991 Month
Show 3 more
  • 3 Month Subscription Plan$39.993 Months
  • 1 Year$69.991 Year
  • Annual Subscription Plan$99.991 Year
One-time1
  • AP Environmental Science$15.99
None

Trigonometry Identities Proofs

No in-app purchases

Questions

Is AP Environmental Science free?
AP Environmental Science is free to download, with in-app purchases available.
Is Trigonometry Identities Proofs free?
Trigonometry Identities Proofs costs $0.99, with no in-app purchases.
Which has better reviews, AP Environmental Science or Trigonometry Identities Proofs?
AP Environmental Science is rated higher. AP Environmental Science averages 4.4 out of 5 from 7 ratings, while Trigonometry Identities Proofs averages 1.0 from 2 ratings.
Do AP Environmental Science or Trigonometry Identities Proofs have ads?
Neither AP Environmental Science nor Trigonometry Identities Proofs shows ads.
Which is updated more often, AP Environmental Science or Trigonometry Identities Proofs?
AP Environmental Science ships an update every 6 months, and Trigonometry Identities Proofs every 32 months. Most recently, AP Environmental Science was updated on October 15, 2026 and Trigonometry Identities Proofs on October 29, 2026.

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