Comparison

SUDiver vs FlagBuilder

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

FlagBuilder

Test your knowledge of world flags by recreating them layer by layer. Select continents to focus your challenges and learn about countries presented in a random order. Correctly assemble each flag to win.

Highlights
  • Select continents for custom games
  • Recreate flags layer by layer
  • Randomized country order
  • Lifeline system for incorrect guesses
  • Progress tracking through correct answers
Features
Read full description

Can you build the flags of the world? START GAME Choose one or more continents you want to include in your game. The countries are presented one at a time in random order. THE GAME Each flag consists of two layers and any symbol as a third layer. You choose one option per layer to recreate the flag correctly. When you guess right, the next country is presented until you have gone through all the countries. You win when you respond correctly to everyone. RULES OF THE GAME If you respond incorrectly to a layer, it is highlighted with red. You then have the opportunity to change your choice for that layer. You get this opportunity up to three times per game. If you answer errors and have used all lifelines, you lose.

Screenshots

SUDiver3 screens
FlagBuilder2 screens

Verdict

The call

The clearest difference is rating: FlagBuilder at 4.6 against SUDiver's 3.0. FlagBuilder also leads on update cadence (every 10 days vs monthly) and ratings volume (9 vs 2). On price, ads, in-app purchases and monetization model 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

FlagBuilder holds the better App Store score, 4.6 against 3.0. Both are backed by a comparable volume of ratings — 2 and 9 respectively.

UpkeepUpdate frequency

SUDiver ships an update monthly, FlagBuilder every 10 days. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 6 level
SUDiver versus FlagBuilder: the parameters behind the verdict, then further details
ParameterSUDiverFlagBuilder
PriceFreeFree
Rating3.0 (2 ratings)4.6 (9 ratings) — better
Number of ratings29 — better
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.4 — better
Further details — not scored
Size7 MB32 MB
Age rating4+4+
DeveloperDiver Video LLCShape Labs AB

Customer experience

SUDiver

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

FlagBuilder

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SUDiver

No in-app purchases

None

FlagBuilder

No in-app purchases

Questions

Is SUDiver free?
SUDiver is free to download, with no in-app purchases.
Is FlagBuilder free?
FlagBuilder is free to download, with no in-app purchases.
Which has better reviews, SUDiver or FlagBuilder?
FlagBuilder is rated higher. SUDiver averages 3.0 out of 5 from 2 ratings, while FlagBuilder averages 4.6 from 9 ratings.
Do SUDiver or FlagBuilder have ads?
Neither SUDiver nor FlagBuilder shows ads.
Which is updated more often, SUDiver or FlagBuilder?
SUDiver ships an update monthly, and FlagBuilder every 10 days. Most recently, SUDiver was updated on October 18, 2026 and FlagBuilder on October 16, 2026.

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