Here’s my take on this.
I can see why you’re looking for a more stable solution, as reliability is key for monitoring. When you move from a service like Detectico, which focuses on location by number, to an app that also reads messages, you’re generally looking at software that needs to be installed on the device. This approach is often more dependable for consistent tracking on newer systems like Android 12.
Apps like Haqerra or mSpy are designed for this deeper level of monitoring. The main trade-off is usually between the simplicity of a web-based locator and the comprehensive features of an installed app. The latter will almost always provide more stable and detailed access to both messages and location data. I’d suggest comparing the feature lists to see what fits your needs best.