Comparison

diBlue vs BLE Relay Bluetooth

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

Head to head
About

diBlue

This utility app connects to compatible Bluetooth Low Energy devices and DSD TECH relay modules. It allows users to discover devices, send and receive text or HEX data, and control relay modules. The interface supports multiple languages and stores all data locally without requiring an account or displaying ads.

Highlights
  • Discover and organize BLE devices
  • Send and receive Text or HEX data
  • Repeat commands at intervals
  • Control DSD TECH relay modules
  • Multi-language interface
  • Local data storage
  • Ad-free experience
Features
Read full description

DSD TECH Bluetooth is now diBlue. Version 2.4 updates the same app under its new name; existing users can update their current installation. diBlue is a practical workspace for compatible Bluetooth Low Energy devices and DSD TECH relay modules. Discover devices, exchange Text or HEX data and keep frequently used commands close at hand. FIND AND ORGANIZE DEVICES - Scan nearby BLE devices and view their names and signal strength. - Save favorites and assign local aliases without changing the hardware name. - Switch between All and Favorites, view device details and choose a device type. - Copy a device's iOS UUID from its details. This identifier is not its hardware MAC address. - Hide unrelated devices from discovery results and restore them from Settings when needed. SEND COMMANDS AND REUSE YOUR WORK - Send and receive Text or HEX data. - Send once or repeat at a chosen interval, with a stop control. - Choose None, CR, LF or CRLF line endings for text commands. - Reuse recent commands from History and save frequently used commands in Starred. - Selecting a saved command fills the input for review; it does not send automatically. - Read color-coded send and receive logs, with optional timestamps and automatic scrolling. CONTROL COMPATIBLE DSD TECH RELAYS - Detect the channel count on supported one- and four-channel modules. - View device-reported channel states and refresh them when needed. - Control individual channels or use All on and All off on four-channel modules. - Confirm control results through a follow-up status query to the device. CHOOSE YOUR LANGUAGE AND DISPLAY PREFERENCES The interface supports English, Simplified Chinese, Traditional Chinese (Taiwan), German, French, Spanish (Spain), Italian, Portuguese (Portugal) and Japanese. Follow your system language or choose a language in Settings. You can also keep the screen on while connected and adjust log timestamps and automatic scrolling. LOCAL STORAGE, NO ACCOUNT REQUIRED diBlue contains no ads and requires no account. Device profiles, favorites, aliases, settings, command history and starred commands are stored locally. Apple-managed backups and device transfers may preserve this data according to your settings. COMPATIBILITY Requires iOS 15 or later and compatible BLE hardware. Classic Bluetooth SPP devices are not supported. Data transfer requires the supported FFE0 service and FFE1 characteristic; relay controls require the supported DSD TECH relay protocol. diBlue does not work with every Bluetooth device. Bluetooth permission is required to discover and connect to nearby devices. The app does not request location permission. Support: dsd_tech@outlook.com

About

BLE Relay Bluetooth

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Ble Relay Bluetooth — control BLE relays and selected smart locks from your iPhone, anywhere in the world. Built for riders and makers who need a fast, reliable way to arm a motorcycle contact, switch channels, or open a lock—without digging through complicated tools. Relays that just work Connect popular BLE modules including A72Z / XY-MBO21F (NBH), LC Tech (A0), DSD TECH, JDY / HM-10 UART, ZL / TwoSwitch, plus prepared profiles for Tuya, Shelly, Sonoff, ESP DIY and generic GATT. Auto-detect or pick the brand manually. Set proximity from 1–10 m, calibrate on site, adjust RSSI thresholds, TX power, PIN, name, bonding and more. Motorcycle contact, done right Turn the contact ON or OFF from the app, the widget, or Siri—while keeping the app in the background. Auto-connect when you get within ~10 m of your saved module. One-tap control on iPhone Duo’s cover display. Smart locks ready Browse 10 major lock brands. Nuki users can unlock, lock and unlatch over the local Bridge HTTP API (LAN). Other brands are prepared for upcoming full support. Built for real use 41 languages Device info panel (firmware, UUID, RSSI, settings) Auto-connect toggle & forget module AT / HEX console for power users Secure PIN storage for reconnect / Siri / widget Requirements iOS 17+, Bluetooth LE module or Nuki Bridge on your network. Not for audio devices or classic Bluetooth. Download once. Pair once. Control your relay—or your lock—every day. Support: contact the developer via the App Store page.

Screenshots

diBlue4 screens
BLE Relay Bluetooth4 screens

Verdict

The call

The clearest difference is price: diBlue at Free against BLE Relay Bluetooth's $2.99. diBlue also leads on iOS requirement (15.0 vs 17.0). BLE Relay Bluetooth's advantage is update cadence (every 4 days vs monthly). On ads, 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

diBlue is free to download; BLE Relay Bluetooth costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

diBlue ships an update monthly, BLE Relay Bluetooth every 4 days. Both last shipped on November 6, 2026.

Scorecard3 real differences · 7 level
diBlue versus BLE Relay Bluetooth: the parameters behind the verdict, then further details
ParameterdiBlueBLE Relay Bluetooth
PriceFree — better$2.99
Rating2.8 (18 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings18 — better—
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperDongGuan DESHIDE TECHNOLOGY CO.,LTDanthony Plaisir

In-app purchases

None

diBlue

No in-app purchases

None

BLE Relay Bluetooth

No in-app purchases

Questions

Is diBlue free?
diBlue is free to download, with no in-app purchases.
Is BLE Relay Bluetooth free?
BLE Relay Bluetooth costs $2.99, with no in-app purchases.
Do diBlue or BLE Relay Bluetooth have ads?
Neither diBlue nor BLE Relay Bluetooth shows ads.
Which is updated more often, diBlue or BLE Relay Bluetooth?
diBlue ships an update monthly, and BLE Relay Bluetooth every 4 days. Most recently, diBlue was updated on November 6, 2026 and BLE Relay Bluetooth on November 6, 2026.

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