There is no privacy-respecting app that can confirm whether a wife is cheating. A tool can show a location or activity signal only when the person has agreed to share it; it cannot explain context or repair trust.
Begin with a specific observation rather than an accusation: “We have stopped talking after work and I feel shut out” is a more useful starting point than demanding access to a phone. Ask what each person considers private, what information is already shared, and whether a counselor could help keep the conversation productive.
If both adults voluntarily want temporary location sharing, use Find My or Google Maps and set a date to review the arrangement. Scannero is suitable only for a recipient-approved location request; the recipient receives a link and chooses whether to share. Buy Scannero →
Do not guess passwords, restore someone else’s backups, install a hidden profile, or use a child-monitoring product on an adult partner. If there is a genuine safety risk or a legal dispute, speak to an appropriate local professional before collecting information.