Comparison

Play BLUno vs RealTech Passkey

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

Head to head
About

Play BLUno

This app facilitates demonstrations and tests with a Bluno controller board using Bluetooth Low Energy. It allows users to easily control and interact with various functions of Arduino-based BLE hardware directly from their phone, offering a new way to learn and play with electronics.

Highlights
  • BLE communication with Bluno controller
  • Control electronic devices
  • Display real-time sensor data
  • Open Source Hardware based
  • DIY and prototyping tool
  • Educational for electronics
Features
Read full description

Play Bluno is an app that provides extreme ease for DIYers,Arduino enthusiasts,and home automation zealots to do demonsrations and tests with Bluno controller board via BLE(Blutooth Low Energy) communication. Specially designed for the Arduino-based BLE hardwares, users can easily learn to control and interact with a variety of functions with their phone. For example, displaying real-time temperature and humidity data on the phone,switching lights on/off or stimulating a full-color L_E_D light. It offers you a new way to learn and play with electronic devices via BLE communication. Based on the Arduino hardware platform, it's quite easy for you to build a network and test your own system based on BLE. Play Bluno is first of its kind to solve the problem of communication between hardwares via BLE and is designed to change this situation. The user interface of Play Bluno is quite clear and straightforward. The 7 areas are designed in correspondence with 7 key functions of the Accessory board,including an L_E_D LCD, a buzzer, a temperature and humidity sensor, a five-way button, a relay module, a full-color L_E_D and a knob. Once opened, the user can see directly the different key functions displayed in one screen. After establishing BLE connection, the user will be able to tweek and controll these functions on the Accessory board simoutaneously on the phone. The Play Bluno and the related hardware design are completely based on the Open Source Hardware concepts. There is documentation and support for this modules. The designs, schematics and codes will be Open Source. Play Bluno will be also a good start for you in tackling hardware installations such as wearables. So for developers now that you have the software and the hardware, it's time to start creating your own things with Play Bluno, and make it whatever you like. Functions and Advantages DIY and Prototyping Educational Switchs for controlling the electronic devices and other functions Based on Arduino opensource hardware platform. Recommended to be used with BLUno board and Accessory board.

About

RealTech Passkey

Generate authentication codes for secure online account access. Easily add accounts by scanning QR codes and store security keys. Advanced encryption protects your personal data.

Highlights
  • OTP generation
  • QR code scanning for account setup
  • Security key storage
  • Advanced encryption
  • Quick authentication code generation
Features
Read full description

RealTech Passkey is an OTP generator app that helps you log into all your online accounts. Scan QR codes to add accounts, store security keys, and generate authentication codes quickly. Protect personal data with advanced encryption technology.

Screenshots

Play BLUno3 screens
RealTech Passkey3 screens

Verdict

The call

The clearest difference is review sentiment: RealTech Passkey at 100% against Play BLUno's 0%. RealTech Passkey also leads on update cadence (every 8 days vs every 2 months). Play BLUno's advantage is iOS requirement (7.0 vs 15.6). On price, ads, in-app purchases and monetization model 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

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

UpkeepUpdate frequency

Play BLUno ships an update every 2 months, RealTech Passkey every 8 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Play BLUno versus RealTech Passkey: the parameters behind the verdict, then further details
ParameterPlay BLUnoRealTech Passkey
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.6
Further details — not scored
Size3 MB39 MB
Age rating4+4+
DeveloperShanghai Zhiwei Robotics Co LtdNEXT GENERATION NETWORK

Customer experience

Play BLUno

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

RealTech Passkey

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Play BLUno

No in-app purchases

None

RealTech Passkey

No in-app purchases

Questions

Is Play BLUno free?
Play BLUno is free to download, with no in-app purchases.
Is RealTech Passkey free?
RealTech Passkey is free to download, with no in-app purchases.
Do Play BLUno or RealTech Passkey have ads?
Neither Play BLUno nor RealTech Passkey shows ads.
Which is updated more often, Play BLUno or RealTech Passkey?
Play BLUno ships an update every 2 months, and RealTech Passkey every 8 days. Most recently, Play BLUno was updated on November 6, 2026 and RealTech Passkey on November 4, 2026.

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