BR433 vs Synapse
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BR433
Read full descriptionHide full description
iPhone Bluetooth pairing Pair using iPhone system Go to Settings > Bluetooth and turn on Bluetooth, Click BR433 and enter the PIN Code 123456 to pair. Attention: Only the first iPhone can use system pairing, the second and third Smartphones can only be paired using the APP. APP Connect and Pair the BR433 Open the APP, then press the top left At list selection: Click BR433, to link, within 30sec., please enter default Connect Key Code (123456) to connect. After that, it will show whether to pair. If you need to pair, please click “OK” -> enter 123456 then click pair. The smartphone will be pair with BR433. Maximum pairing with 3 iPhone. Note: If you did not pair the BR433 with your iPhone you will need to enter the Connect Key Code every time to connect. Attention: According Bluetooth feature limit, only one phone can connect and work with main unit each time, must disconnect present connected phone(switch Off Bluetooth or keep connected phone over Bluetooth range)before enable connect another phone Bluetooth. So please disconnect all paired phones before pair a new iPhone.
Synapse
Assess the hardware functionality of a device before buying or selling. It performs comprehensive on-device checks for cameras, sensors, connectivity, and more, generating a shareable certificate of its condition. This ensures transparency and confidence in transactions.
- On-device hardware testing
- Comprehensive sensor checks
- Shareable pass/fail certificate
- No account or data sharing
- Quick free check available
- Full diagnostic for purchase
Read full descriptionHide full description
Buying or selling a used iPhone? Know what works before money changes hands. Synapse helps you test key iPhone hardware — including cameras, speakers, microphones, sensors, buttons, connectivity, and biometrics — then creates a clear pass/fail device report you can share with a buyer, seller, repair shop, or resale listing. QUICK CHECK — FREE Run a basic test in minutes. No purchase required. Tests include: • Display • Touchscreen • Rear camera • Wi-Fi • Bluetooth FULL DIAGNOSTIC Unlock the complete hardware test suite and generate a shareable device report. Full Diagnostic includes: • Front camera and flashlight • Video recording • Microphones and speakers • Proximity sensor • Motion sensors • Screen rotation • Face ID or Touch ID sensor check • Vibration motor • Volume, lock, and mute buttons • GPS / location accuracy • System integrity indicators • Shareable pass/fail report with device details DEVICE CHECKS Purchase Device Checks in the app and save them to your account. Available options: • Single Device Check • 3 Device Checks • 10 Device Checks Sign in with Apple or email to save your purchased Device Checks, view your remaining checks, and use them on this device or another signed-in device. KEY FEATURES • Free Quick Check • Full Diagnostic hardware testing • Shareable pass/fail device report • Device Checks saved to your account • View remaining Device Checks in your Profile • Useful for buying, selling, repairing, or verifying a used iPhone PRIVACY Synapse runs hardware tests on your device. Your account is used to save purchased Device Checks and help you access them across signed-in devices. Permissions may be requested for camera, microphone, location during GPS testing, motion sensors, Bluetooth, Face ID / Touch ID checks, and local network features when needed. Apple, iPhone, Face ID, and Touch ID are trademarks of Apple Inc.
Screenshots
Verdict
The clearest difference is in-app purchases: BR433 at none against Synapse's 3. Synapse's advantage is update cadence (every 6 days vs every 2 months). On price, ads, device support and iOS requirement 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
Both are free to download. Synapse sells 3 one-off in-app purchases. BR433 asks for nothing beyond the download.
BR433 ships an update every 2 months, Synapse every 6 days. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.
| Parameter | BR433 | Synapse |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (10 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 10 — better |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | iKey CORP | Nexus Link LLC |
In-app purchases
BR433
No in-app purchases
Synapse
- Full Diagnostic$2.99
- 3 Checks — Best Value$4.99
- 10 Checks — Pro Pack$9.99









