Comparison

SUDiver vs Stars Units Sizes Objects

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

Head to head
About

SUDiver

This educational app brings Stanford University's digital interactive video exploration tools to mobile devices. It allows users to create and share time-space referenced video clips, enabling detailed analysis of any video content.

Highlights
  • Guided-noticing spatial and temporal video referencing
  • Touch interface for moving and resizing reference rectangles
  • Networked sharing of point-of-view video clips
  • Analysis of personal videos and YouTube content
  • Social sharing of video clips to platforms like Twitter and Facebook
Read full description

The Diver app brings the original Stanford University Digital Interactive Video Exploration and Reflection (DIVER) project* to Apple's iPad and iPhone. Features of the new app include: • A touch interface implementation of Diver's "guided-noticing" spatial and temporal point-of-view video referencing; users can move & resize the Diver guided-noticing rectangle via iOS's familiar touch interface. • An updated implementation of Diver's networked/Internet sharing of point-of-view video clips– allowing for a) dives** directly on your own or anyone else's videos, and b) easy social sharing of dive clips. For more info about the app read the latest notes/documentation: https://app.diver.video/howto/diver_howto_442_01.php Please also see our EULA (end-user-licensing-agreement): https://app.diver.video/eula * For more info about the original Stanford University Diver project visit: https://diver.stanford.edu ** "Dives" are time/space referenced video clips made by (temporally) selecting sub-portions of a video and (spatially) highlighting areas of the video's frame.

About

Stars Units Sizes Objects

Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.

Highlights
  • Compare object sizes
  • View object images
  • Pinch/Zoom and Pan images
  • Unit conversion for distances
  • Explore scales from Planck length to observable universe
  • Learn about stars and galaxies
Features
Read full description

Size of the smallest to largest objects and stars. Compare the size of objects in the universe. Object images. Pinch/Zoom image. Pan/Move image. Rotate image. Double tap to reset an image. From the smallest to the largest one. From planck length to observable universe. From Yoctometre, Zeptometre, Attometre, Femtometre, Picometre, Nanometre, Micro, Millimetre, Centimetre, Metre, KiloMetre, Lightyear, Parsecs, Billion Lightyears to 93 Billion Lightyears. Size of objects, particles, atoms, cells, stars and galaxies. Get to know the stars. Get to know the spaces. get to know the universe. How small is this world. How big is the universe. And How great is the creator. How far is the star distance from earth. Two way 18 distance unit conversion. planck length, yoctometer, zeptometer, attometer, femtometer, picometre, nanometre, micrometre, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Mile, Astronomical, Lightyear, Parsecs. Perform auto conversion when picker is changed. Share conversion result. Reset unit convertor.

Screenshots

SUDiver3 screens
Stars Units Sizes Objects4 screens

Verdict

The call

The clearest difference is rating: Stars Units Sizes Objects at 4.2 against SUDiver's 3.0. Stars Units Sizes Objects also leads on iOS requirement (11.0 vs 15.6). SUDiver's advantage is ads (none vs shown) and update cadence (monthly vs every 4 months). On price, ratings volume, in-app purchases 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

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

ReceptionRating · Positive reviews · Number of ratings

Stars Units Sizes Objects holds the better App Store score, 4.2 against 3.0. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

SUDiver ships an update monthly, Stars Units Sizes Objects every 4 months. The most recent releases landed on October 1, 2026 and September 22, 2026 respectively.

Scorecard5 real differences · 5 level
SUDiver versus Stars Units Sizes Objects: the parameters behind the verdict, then further details
ParameterSUDiverStars Units Sizes Objects
PriceFreeFree
Rating3.0 (2 ratings)4.2 (5 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings25 — better
Update frequencyMonthly — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size7 MB124 MB
Age rating4+4+
DeveloperDiver Video LLCMudarmeen Munlin

Customer experience

SUDiver

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

Stars Units Sizes Objects

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

SUDiver

No in-app purchases

None

Stars Units Sizes Objects

No in-app purchases

Questions

Is SUDiver free?
SUDiver is free to download, with no in-app purchases.
Is Stars Units Sizes Objects free?
Stars Units Sizes Objects is free to download, with no in-app purchases.
Which has better reviews, SUDiver or Stars Units Sizes Objects?
Stars Units Sizes Objects is rated higher. SUDiver averages 3.0 out of 5 from 2 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.
Do SUDiver or Stars Units Sizes Objects have ads?
Stars Units Sizes Objects shows ads; SUDiver does not.
Which is updated more often, SUDiver or Stars Units Sizes Objects?
SUDiver ships an update monthly, and Stars Units Sizes Objects every 4 months. Most recently, SUDiver was updated on October 1, 2026 and Stars Units Sizes Objects on September 22, 2026.

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