# SUDiver vs FlagBuilder

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.

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

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.

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

## The numbers

| Metric | SUDiver | FlagBuilder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sudiver/id1294150341/reviews) | **[4.6 (9 ratings)](https://appshunter.io/ios/app/flagbuilder-flag-puzzle/id6443924386/reviews)** |
| Number of ratings | 2 | **9** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | Free |
| Size | 7 MB | 32 MB |
| Requires iOS | 15.6 | **15.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Diver Video LLC](https://appshunter.io/developer/412839658) | [Shape Labs AB](https://appshunter.io/developer/1535699607) |

## What reviewers say

### SUDiver

[App page](https://appshunter.io/ios/app/sudiver/id1294150341)

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

**In-app purchases:** none


### FlagBuilder

[App page](https://appshunter.io/ios/app/flagbuilder-flag-puzzle/id6443924386)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*