Blue Switch vs Bluetooth V2.1 SPP Setup
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blue Switch
Control 2, 4, or 8 channel Bluetooth BLE relay modules from your iPhone or iPad. Assign custom names to modules and individual relays for easy identification and management. Enhance security by changing the default password.
- Control 2, 4, or 8 channel relay modules
- Bluetooth BLE connectivity
- Assign custom module aliases
- Assign custom relay aliases
- Change default password for security
- Connect to multiple modules
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This app allows you to control a 2, 4 or 8 Channel Relay Module Bluetooth BLE with your iPhone or iPad. To use this app, you need one of these three modules: "2 Channel Relay Module Bluetooth BLE" "4 Channel Relay Module Bluetooth BLE" "8 Channel Relay Module Bluetooth BLE" These modules can be ordered at many online shops. Please use a search engine to find a shop. This app can be connected with any number of modules. By entering an alias, the modules are marked clearly and can easily be assigned to a use area. Name the modules for example "Relay 1", "Relay 2", "Electronic lab project" or "Ambient Light". An alias can also be entered for each relay. The default password for these modules is usually "12345678". For more security, the app also allows you to change the password. The password must be eight digits long.
Bluetooth V2.1 SPP Setup
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The iOS portable devices will connect with the Bluetooth Low Energy (BLE) to serial port converter devices and exchange data with them bi-directional. The serial port includes RS-232 or RS-422 RS-485 interfaces. The user will test the APP with the SCADA, Robot, UAV, PLC, CNC or etc. with the BLE to serial port devices. The APP will be customized to meet the specific applications.
Screenshots
Verdict
The clearest difference is in-app purchases: Bluetooth V2.1 SPP Setup at none against Blue Switch's 1. Bluetooth V2.1 SPP Setup also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 3 months). On price 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
Both are free to download. Blue Switch sells 1 one-off in-app purchase. Bluetooth V2.1 SPP Setup asks for nothing beyond the download.
Blue Switch ships an update every 3 months, Bluetooth V2.1 SPP Setup every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Blue Switch | Bluetooth V2.1 SPP Setup |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (43 ratings) — better | — |
| Positive reviews | 16.7% of reviews | — |
| Number of ratings | 43 — better | — |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 39 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitalij Schaefer | FUH CHERNG SHEU |
In-app purchases
Blue Switch
- Remove Ads$17.99
Bluetooth V2.1 SPP Setup
No in-app purchases
Questions
Is Blue Switch free?
Is Bluetooth V2.1 SPP Setup free?
Do Blue Switch or Bluetooth V2.1 SPP Setup have ads?
Which is updated more often, Blue Switch or Bluetooth V2.1 SPP Setup?
Other comparisons
