Mars Book vs Montana CDL Test Prep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mars Book
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The Mars Book is an app that is dedicated for observing Mars which will make close approach in summer 2020. Mars will come close to Earth from September 2020 through October 2020. Closest approach will take place on October 6, 2020. Mars Book is a highly useful Mars observing app which will indicate the location of Mars visible in the sky. It shows you why Mars Close Approach will take place, and it is explained readily using animated illustrations and star charts at a viewpoint from outer Space. Mars Close Approaches taking place 23 times from the year 2003 through 2050 will be displayed and apparent retrograde motion of Mars will be displayed. Enjoy Mars Close Approach this summer with the Mars Book app!
Montana CDL Test Prep
Prepare for your commercial driver's license exams with over 580 practice questions covering all essential topics. Study offline, access free resources like the CDL manual, and track your progress to build confidence for the real DMV test.
- 580+ practice questions
- Offline study mode
- Includes CDL Manual and Road Signs
- Preview answers and bookmark questions
- Progress tracking
- Printable cheat sheets
- Study mode with explanations
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Join over 40,000 successful drivers who have used our app to pass their CDL exams! This comprehensive practice test app is key to mastering the material and building confidence. Why Choose Montana CDL Test Prep? • Targeted Practice: 580+ practice questions in nine categories, matching the format and style of the real DMV exam. • Learn On-the-Go: Study offline, anytime and anywhere, fitting your learning into your busy schedule. • Free Resources: Includes the Montana CDL Manual and Road Signs for comprehensive preparation. • Smart Features: Preview answers, bookmark questions, and track your progress to optimize your study time. Ready for More? Upgrade to our "CDL Made Easy" full course for in-depth lessons and interactive quizzes to ensure you pass your CLP test with flying colors! (In-app purchase required) What's Included in the Practice Test: • Questions covering all essential topics: - Air Brakes - Combination Vehicles - Doubles and Triples - Driving Safely - Hazardous Materials - School Bus - Tank Vehicles - Transporting Cargo - Transporting Passengers • Printable cheat sheets for quick review • Study mode with immediate answer checking and explanations Get Started Today! Don't leave your CDL success to chance. Download the Montana CDL Test Prep app now and start your journey to becoming a licensed commercial driver! Note: These practice questions were developed by CDL experts and based on the work supported by the Federal Motor Carrier Safety Administration. Questions are available in English only.
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Verdict
The clearest difference is price: Mars Book at Free against Montana CDL Test Prep's $12.99. Mars Book also leads on in-app purchases (none vs 1) and update cadence (every 13 months vs every 30 months). 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
Mars Book is free to download; Montana CDL Test Prep costs $12.99 up front. Montana CDL Test Prep sells 1 one-off in-app purchase. Mars Book asks for nothing beyond the download.
Mars Book ships an update every 13 months, Montana CDL Test Prep every 30 months. The most recent releases landed on October 26, 2026 and November 4, 2026 respectively.
| Parameter | Mars Book | Montana CDL Test Prep |
|---|---|---|
| Price | Free — better | $12.99 |
| Rating | — | 3.7 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 13 months — better | Every 30 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 14 MB | 20 MB |
| Age rating | 4+ | 12+ |
| Developer | Vixen Co.,Ltd. | Kelvin Beecroft |
In-app purchases
Mars Book
No in-app purchases
Montana CDL Test Prep
- CDL Made Easy - Full Course$24.99
Questions
Is Mars Book free?
Is Montana CDL Test Prep free?
Do Mars Book or Montana CDL Test Prep have ads?
Which is updated more often, Mars Book or Montana CDL Test Prep?
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