Flutter Builder vs Scan21
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flutter Builder
This visual development tool simplifies app creation for Flutter developers. It offers an intuitive graphical programming interface, making it accessible for both beginners and experienced professionals to build applications quickly.
- Visual development environment
- Graphical programming pattern
- Intuitive interface
- Rapid application building
- Suitable for beginners and professionals
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Flutter Builder is a visual development tool specifically designed for Flutter developers, aiming to provide them with an efficient and intuitive application development environment. Flutter Builder uses a new graphical programming pattern to make application development more intuitive and convenient. With Flutter Builder, whether you are an experienced professional developer or a beginner just entering the programming world, you can quickly build beautiful applications.
Scan21
Quickly verify if individuals meet the 21+ age requirement by scanning the barcode on their ID. Get instant visual and audio feedback for eligibility. Works offline and tracks scan history.
- Scan ID barcodes with device camera
- Automatic age calculation for 21+
- Clear visual (green/red screen) feedback
- Optional audio alerts
- Scan history and statistics
- Offline functionality
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Scan21 – Age ID Check helps you quickly verify if someone meets the 21+ legal age requirement by scanning the barcode on their ID. Perfect for bars, clubs, liquor stores, dispensaries, or any venue requiring instant age checks. Simply scan, and the app will automatically calculate the age, alerting you with clear visual and audio feedback. Features: Fast & Accurate Scanning – Uses your device camera to read ID barcodes. Automatic Age Calculation – Instantly determines if the person is 21+. Clear Visual Feedback – Green screen for eligible, red screen for ineligible. Audio Alerts – Optional success/failure tones for quick recognition. Scan History & Stats – Tracks the total number of successful and failed scans. Simple & Reliable – No internet required, works offline. This tool is designed to make age verification quick, professional, and hassle-free. Disclaimer: This app is for age screening assistance only and should not replace manual ID verification. Always follow your local laws and regulations.
Screenshots
Verdict
The clearest difference is review sentiment: Flutter Builder at 100% against Scan21's 0%. Scan21's advantage is price ($1.99 vs $3.99). On ads, in-app purchases, monetization model and chart position 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
Flutter Builder costs $3.99 and Scan21 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Flutter Builder | Scan21 |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Rating | — | 2.3 (3 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #105 — better | #140 |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 58 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | 上海烨鑫信息科技有限公司 | TelliSIM - Travel eSIM solutions |
Customer experience
Flutter Builder
Scan21
In-app purchases
Flutter Builder
No in-app purchases
Scan21
No in-app purchases
Questions
Is Flutter Builder free?
Is Scan21 free?
Do Flutter Builder or Scan21 have ads?
Which is more popular, Flutter Builder or Scan21?
Other comparisons
