The AI chat analyzer that reads what's underneath.

An AI chat analyzer is an app that reads a real conversation and turns it into structured insight: compatibility, interest level, red flags, and the patterns you can't quite name. Undertone does this for chats exported from WhatsApp or pasted in from any messaging app, and never stores the copy you send.

Consistent initiation, real questions about your life, full-sentence replies, and concrete plans are the clearest signs he likes you over text. One-word answers and days of silence point the other way. Undertone measures these signals across the whole conversation instead of one screenshot.

Mixed signals over text usually mean interest and hesitation at the same time: warm one day, distant the next. Common causes are uncertainty, competing options, or an avoidant texting style. Analyzing the full conversation shows which one you're actually dealing with.

Red flags in texting include love bombing, hot-and-cold cycles, guilt-tripping, vague plans that never materialize, and replies that only arrive late at night. One flag is a mood; a repeating pattern is a message. Undertone finds each flag and explains why it matters.

Open the chat in WhatsApp, tap the contact's name, choose Export Chat → Without Media, then import the file into Undertone. The app reads the full history and returns compatibility, interest levels, and flags in about a minute.

With Undertone, yes: your chat is sent to an AI provider (currently OpenAI, reached via OpenRouter) for a single analysis, our own service never stores it, and it is never used to train AI models. A consent screen shows exactly what will be sent before anything leaves your phone.

Undertone works with WhatsApp, Instagram, Snapchat, Tinder, Bumble, Hinge, iMessage, and Messenger. WhatsApp exports give the richest analysis; for everything else, paste the conversation text. Names are replaced with “Person A” and “Person B” before anything is sent.

Undertone costs $29.99/year (about $0.58 a week) or $4.99/week, and both start with a real 7-day free trial. The price is visible before you commit, and cancelling is two taps. No traps.

Texting compatibility is how well two people's messaging styles fit: pace, effort balance, initiation, humor, and emotional tone. Undertone scores it from a real conversation rather than a quiz about hypotheticals.

Your texting can show anxious, avoidant, or secure attachment patterns. Double-texting and over-reading pauses lean anxious; warm-then-distant swings lean avoidant; a steady rhythm leans secure. Undertone reads these patterns from reply rhythms and message content across the conversation.