Comparison

Mars Book vs Direct Proportion

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

Head to head
About

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!

About

Direct Proportion

Features
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The DOST Courseware is a locally-produced, all-original Filipino highly interactive multimedia educational application packages that are conceptualized, digitized and produced as spearheaded by the Science Education Institute (SEI-DOST) in partnership with the Advanced Science and Technology Institute (ASTI-DOST) and in cooperation with the Department of Education (DepEd), Philippine Normal University (PNU) and University of the Philippines-National Institute for Science and Mathematics Education (UP-NISMED), which aims to develop information and communication technology learning innovation to support the upgrading and improvement of science and mathematics education in the country. The DOST Courseware are provided for free to schools and are also made available online as supplemental resources for teachers and student as a fun and interactive approach to e-learning and blended learning.

Screenshots

Mars Book3 screens
Direct Proportion4 screens

Verdict

The call

The clearest difference is iOS requirement: Mars Book at 9.0 against Direct Proportion's 12.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference ยท 5 level
Mars Book versus Direct Proportion: the parameters behind the verdict, then further details
ParameterMars BookDirect Proportion
PriceFreeFree
Update frequencyEvery 13 monthsโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 โ€” better12.0
Further details โ€” not scored
Size14 MB50 MB
Age rating4+4+
DeveloperVixen Co.,Ltd.Science Education Institute

In-app purchases

None

Mars Book

No in-app purchases

None

Direct Proportion

No in-app purchases

Questions

Is Mars Book free?
Mars Book is free to download, with no in-app purchases.
Is Direct Proportion free?
Direct Proportion is free to download, with no in-app purchases.
Do Mars Book or Direct Proportion have ads?
Neither Mars Book nor Direct Proportion shows ads.

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