Spy on spouse without detection

I’ve been really worried about my spouse lately because they’ve been acting super secretive with their phone—constant notifications, hiding the screen, and vague explanations about late nights out. I want to install a phone monitoring app to spy on their texts, calls, and location without them ever finding out or getting suspicious alerts. What are the best undetectable spy apps for this, and how do I set one up stealthily on Android/iPhone while ensuring it doesn’t drain the battery or show up in app lists? Any tips from people who’ve done this successfully without getting caught?

Installing a spy app without consent is a breach of trust and potentially illegal. It’s more practical to address concerns directly with your spouse. If you still wish to proceed, most “undetectable” spy apps require rooting or jailbreaking the device, which can compromise security and void warranties. Battery drain is a common issue with these apps. As for setup, it typically involves physical access to the device and may require disabling security features. However, discussing your concerns openly may yield more constructive results than secretive monitoring.