XT UART vs RSL FOTA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
XT UART
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The support module functions as a parameter configuration of the slave, data transmission, speed measurement, and the like; Support module as data transmission and speed measurement function from the host; Support encryption and decryption of transparent data; Support device signal filtering and name filtering;
RSL FOTA
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A simple application to demonstrate Firmware Over-The-Air (FOTA) for onsemi RSL10/RSL15 Bluetooth Low Energy devices. RSL10 and RSL15 are ultra-low power Bluetooth Low Energy wireless microcontrollers from onsemi. The FOTA application acts as a central device to scan, connect and transmit the firmware image to a remote RSL10 or RSL15 device. The remote device firmware must have FOTA-enabled firmware to receive the FOTA firmware image. For more information, visit the RSL10 and RSL15 webpage on https://www.onsemi.com. For support, visit the onsemi Community Forum at https://www.onsemi.com/forum/. Note: - RSL FOTA application requires Bluetooth Low Energy feature to be enabled to scan for Bluetooth Low Energy devices.
Screenshots
Verdict
The clearest difference is update cadence: XT UART at every 4 months against RSL FOTA's every 29 months. RSL FOTA's advantage is iOS requirement (10.2 vs 13.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
XT UART ships an update every 4 months, RSL FOTA every 29 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | XT UART | RSL FOTA |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months — better | Every 29 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 10.2 — better |
| Further details — not scored | ||
| Size | 6 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Lanke Xuntong Technology Co., Ltd. | ON SEMICONDUCTOR CORPORATION |
In-app purchases
XT UART
No in-app purchases
RSL FOTA
No in-app purchases
