Comparison

3D STEREOVISION TIME MACHINE 2 vs Grav Box

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

Head to head
About

3D STEREOVISION TIME MACHINE 2

Explore historical moments and figures through immersive 3D stereoscopic images. View iconic figures and events from over 150 years ago in a unique, interactive format.

Highlights
  • 3D stereoscopic image viewing
  • Flipvision animations
  • Historical portraits and scenes
  • Vintage music background
  • Interactive image navigation
Features
Read full description

150 Years ago Abraham Lincoln posed for a portrait just days before he was assassinated and the USA and the World was being photographed…. ALL IN 3D !!!! (Touch bottom of image for next, top for home!) FROM the very NEW, Mobile Entertainment Products startup... JOHN AVATAR™ (Malibu, CA) comes.... 3D STEREOVISION TIME MACHINE 2 (USA and the World) For the very first time… Bringing 3D StereoVision to the iPad, iPhone and iPod Touch! This APP now includes both “STEREOVISION/StereoGraph” and “FLIPVISION” animations images, for full 3D image viewing. FLIPVISION requires nothing other than your Device, no special glasses needed. STEREOVISION is best viewed with a StereoScope, which you can make your own, or buy one. Hey…. I just made your iPad, iPhone and iPod Touch a; http://en.wikipedia.org/wiki/View-Master Back then, 3D Stereography was extremely popular with world leaders and the well connected. I bring you Lincoln, Roosevelt, Edison, Mark Twain Ghandi, Babe Ruth.... Booker T. Washington!!!! The music in the background is from the First Sound Recordings by Thomas Edison; 1) Myona-Hawaiian Waltz (Morgan--Friedland)--Waikiki Hawaiian Orchestra, 1920 2) Crazy Blues (Perry Bradford)--Noble Sissle, 1921 3) Kitten on the Keys (Zez Confrey)--Zez Confrey, 1921 4) Umbrellas to Mend (Mel B. Kaufman)--Frisco "Jazz" Band, 1918 5) Prelude in C Sharp Minor Op. 3(Sergei Rachmaninoff)--Sergei Rachmaninoff, 1920 Following is the list of 3D Sterevision images I present to you (in order); 01) 1865 - Hon. Abraham Lincoln, President of the United States 02) 1903 - President Roosevelt in his private office 03) 1902 - Theodore Roosevelt greeting "the boys" - "Rough Rider" 04) 1906 - Booker T. Washington, an American educator, author, orator, and political leader. 05) 1921 - Winston Churchill standing next to Mrs. Churchill 06) 1921 - Winston Churchill, Lawrence (of Arabia!) 07) Mahatma Gandhi looking at StereoVision & statue of him 08) Mahatma Gandhi & statue of him 09) Thomas Edison lightbulb 10) Thomas Edison electronics 11) Thomas Edison more stuff 12) Alexander Graham Bell 13) 1929 - Charles Lindbergh 14) 1929 - The Spirit of St. Louis being guarded by the United States, Washington, DC 15) 1930 - Babe Ruth, King of Swat, at St. Petersburg, Florida 16) 1900 - Mark Twain (Samuel Langhorne Clemens), standing by window 17) 1908 - Mark Twain aka Samuel Clemens, standing at end of pool table 18) Mark Twain in bed 19) 1930 - Egypt, The Graf Zeppelin's rendezvous with more than 4,000 year old Pyramids of Gizeh 20) 1936 - Egypt, Thebes Colossi of Memnon 21) StereVision Camera pre WW2 22) 1926 - Child looking through StereoVision viewer (notice the light) 3D SV TM™ is a Trademark of John Avatar™ 3D STEREOVISION™ is a Trademark of John Avatar™ 3D FLIPVISION™ is a Trademark of John Avatar™ 3D STEREOVISION TIME MACHINE™ is a Trademark of John Avatar™ “3D STEREOVISION MOBILE APP” Patent Applying for by John Avatar™ This APP (C) Copyright, Produced, Designed and Developed by John Avatar™ http://www.JohnAvatar.com I did use the Cocos2D, CocosDenshion SimpleAudioEngine for audio playback and management. If you would like to play your own music as background to these images, startup the Music APP on your Apple iProduct, select your music, start that playing, start this APP up and your music will replace the music I selected. Feel free to email me regarding this APP and if you need APP’s developed and especially if you are interested in funding my very fast growing START-UP!!!!:^) (I’m always looking.) JOHN AVATAR™ Malibu, California USA Email: JohnAvatar@JohnAvatar.com WebSite: http://johnavatar4d.blogspot.com

About

Grav Box

Control gravity with a tap and hold to manipulate objects. Customize their appearance, explore dynamic physics, and engage in arcade challenges with leaderboards and achievements.

Highlights
  • Tap and hold to control gravity
  • Customize grav colors and emojis
  • Dynamic backgrounds and physics effects
  • Arcade mode with achievements
  • Global leaderboards
  • In-game events like black holes
Features
Read full description

Grav Box places gravity at your fingertips. Tap and hold on the screen to control the gravitational field around your gravs and manipulate them in limitless ways. Customize your entire experience by setting gravs to any color or emoji, explore dynamic backgrounds and physics effects, and even modify the effects of gravity itself. With custom preferences set, head to the arcade to unlock achievements and compete against global leaderboards. Be prepared for black holes, gravitational shifts, and many other in-game events that will impact your gameplay.

Screenshots

3D STEREOVISION TIME MACHINE 24 screens
Grav Box4 screens

Verdict

The call

The clearest difference is in-app purchases: 3D STEREOVISION TIME MACHINE 2 at none against Grav Box's 10. 3D STEREOVISION TIME MACHINE 2 also leads on ads (none vs shown) and iOS requirement (9.0 vs 14.0). Grav Box's advantage is ratings volume (26 vs 2). On price, rating, review sentiment and update cadence 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

Both are free to download. Grav Box sells 10 one-off in-app purchases. 3D STEREOVISION TIME MACHINE 2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

3D STEREOVISION TIME MACHINE 2 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Grav Box has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of 3D STEREOVISION TIME MACHINE 2's written reviews are positive against 96% of Grav Box's.

UpkeepUpdate frequency

3D STEREOVISION TIME MACHINE 2 ships an update every 3 months, Grav Box every 5 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
3D STEREOVISION TIME MACHINE 2 versus Grav Box: the parameters behind the verdict, then further details
Parameter3D STEREOVISION TIME MACHINE 2Grav Box
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (26 ratings)
Positive reviews100.0% of reviews — better96.0% of reviews
Number of ratings226 — better
Update frequencyEvery 3 months — betterEvery 5 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better14.0
Further details — not scored
Size60 MB10 MB
Age rating4+4+
DeveloperJohn AvatarGianluca Capraro

Customer experience

3D STEREOVISION TIME MACHINE 2

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Grav Box

All ratings26 ratings
Positive96.2%
Neutral0.0%
Negative3.8%
Written reviews25 reviews
Positive96.0%
Neutral0.0%
Negative4.0%

In-app purchases

None

3D STEREOVISION TIME MACHINE 2

No in-app purchases

10 purchases

Grav Box

One-time10
  • Gold Blocks (100) Pack$0.99
  • Light Portal$0.99
  • Dark Portal$0.99
Show 7 more
  • Grav Box$0.99
  • Midnight$0.99
  • Daybreak$0.99
  • Beach$0.99
  • Jungle$0.99
  • Mist$0.99
  • Gold Blocks (1000) Pack$4.99

Questions

Is 3D STEREOVISION TIME MACHINE 2 free?
3D STEREOVISION TIME MACHINE 2 is free to download, with no in-app purchases.
Is Grav Box free?
Grav Box is free to download, with in-app purchases available.
Which has better reviews, 3D STEREOVISION TIME MACHINE 2 or Grav Box?
3D STEREOVISION TIME MACHINE 2 is rated higher. 3D STEREOVISION TIME MACHINE 2 averages 5.0 out of 5 from 2 ratings, while Grav Box averages 4.8 from 26 ratings.
Do 3D STEREOVISION TIME MACHINE 2 or Grav Box have ads?
Grav Box shows ads; 3D STEREOVISION TIME MACHINE 2 does not.
Which is updated more often, 3D STEREOVISION TIME MACHINE 2 or Grav Box?
3D STEREOVISION TIME MACHINE 2 ships an update every 3 months, and Grav Box every 5 months. Most recently, 3D STEREOVISION TIME MACHINE 2 was updated on October 19, 2026 and Grav Box on October 24, 2026.

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