Comparison

optrel vs BLE Serial Pro

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

Head to head
About

optrel

Features
Read full description

Optrel - your connection to swiss air respiratory systems With the Optrel app, you can transform your mobile device into a powerful control and monitoring tool for your swiss air respiratory system. Thanks to modern Bluetooth Low Energy (BLE) technology, the app provides you with a seamless connection and gives you comprehensive control and insight into the status of your swiss air. Main functions AIR FLOW CONTROL: Adjust the air flow of your swiss air respirator directly via the app to ensure optimum breathing conditions at all times. Whether you need a lower or higher air supply, the adjustment is simple and intuitive. BATTERY CHARGE & FILTER STATUS: Check the current battery charge level and filter status of your swiss air device at a glance. This important information helps you to ensure that your appliance is ready for use and to carry out any necessary maintenance in good time. BLOWER RUNTIME: Read out the total running time of the fan to get an overview of the operating time. This function is particularly useful for maintenance planning and tracking usage history. SENSOR VALUES: The app allows you to read out the temperature and pressure sensor values of the swiss air control unit. This data provides you with valuable insights into the ambient conditions and helps you maximize the safety and efficiency of your respirator. FIRMWARE UPDATES: With the Optrel app, you can carry out firmware updates for your swiss air device quickly and easily. Always stay up to date with the latest technology and benefit from the latest functions and improvements. USER EXPERIENCE: The Optrel app has been developed with a focus on user experience and intuitive operation. Thanks to the clear and concise user interface, you can use all functions effortlessly, whether you are an experienced professional or a new user. SAFETY & RELIABILITY: Your safety is our top priority. The Optrel app provides you with reliable and accurate information about your swiss air so that you can rely on your equipment in any situation. REGULAR UPDATES: We are constantly working to improve the Optrel app and provide regular updates to add new features and optimise performance. Your feedback is very important to us as we strive to provide the best possible user experience. COMPATIBILITY: The Optrel app is compatible with all iOS devices (from iOS 11.0), except tablets that support BLE, and has been specially developed for seamless integration with Swiss air respirators. Download the Optrel app today and experience the next generation of respirator control. SUPPORT: If you have any questions or need support, our customer support team will be happy to help. Visit our website or contact us directly via the app. swiss air – safety never felt so comfortable. Download the app now and benefit from the versatile control and monitoring functions offered by the Optrel app. Connect to your swiss air and optimise your safety and performance in the field.

About

BLE Serial Pro

Transform your iOS device into a wireless serial terminal for Bluetooth Low Energy devices. Send commands and receive data in real-time from various IoT hardware, making debugging and development seamless.

Highlights
  • Connect to any BLE serial device
  • Send commands and receive data
  • Programmable buttons for quick commands
  • Live console strip for real-time feedback
  • Customizable display options
  • Smart alerts for specific data patterns
Features
Read full description

A range of devices use Texas Instruments’ CC2540/CC2541 system-on-chip as a Bluetooth Low Energy (BLE) interface and are compatible with Android and iOS platforms. BLE boards as the AT-09, MLT-BT05, HM-10, JDY-08, JDY-10 et cetera use CC2540/41 chips and can be connected to the serial ports of Arduino's and Raspberry's. Features: • Fully customisable console view, with options like: - Display format (ASCII, Hex, Dec, etc.) - Line numbers and timestamps - Newline behaviour - Style (code or chat) and sound effects • Send data how it suits you: - In different formats (ASCII, Hex, Dec, etc.) - With or without newline/carriage return character at the end - All at once or in chunks (to accommodate for processing time) • Create buttons to send pre-determined messages - Customise the messages, titles, color and layout - Optionally send message repeatedly while button is pressed - Optionally append newline character to messages - These buttons can be exported, to be imported on other devices • Completely functional bluetooth explorer included! Find out the services, descriptors and other properties of any bluetooth device in range • "Send on Connect" option, to send a preset message after pairing • "Auto Reconnect" option, to reconnect automatically to the previous device • Easily copy or share the sent and received messages • Editable service/characteristic UUIDs to connect to • Read/Write characteristic UUIDs can be set separately • Easy to use minimalist layout

Screenshots

optrel4 screens
BLE Serial Pro4 screens

Verdict

The call

The clearest difference is price: optrel at Free against BLE Serial Pro's $3.99. optrel also leads on iOS requirement (12.2 vs 15.6). BLE Serial Pro's advantage is device support (4 vs 2). On update cadence, ads and in-app purchases 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

optrel is free to download; BLE Serial Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

optrel ships an update every 6 months, BLE Serial Pro every 5 months. The most recent releases landed on June 11, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 7 level
optrel versus BLE Serial Pro: the parameters behind the verdict, then further details
ParameteroptrelBLE Serial Pro
PriceFree — better$3.99
Rating—4.5 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.2 — better15.6
Further details — not scored
Size207 MB5 MB
Age rating4+4+
Developeroptrel tec agEd Nieuwenhuys

In-app purchases

None

optrel

No in-app purchases

None

BLE Serial Pro

No in-app purchases

Questions

Is optrel free?
optrel is free to download, with no in-app purchases.
Is BLE Serial Pro free?
BLE Serial Pro costs $3.99, with no in-app purchases.
Do optrel or BLE Serial Pro have ads?
Neither optrel nor BLE Serial Pro shows ads.
Which is updated more often, optrel or BLE Serial Pro?
optrel ships an update every 6 months, and BLE Serial Pro every 5 months. Most recently, optrel was updated on June 11, 2026 and BLE Serial Pro on September 14, 2026.

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