Practice the conversation before you have it.

Nosa is an iPhone app for Christians who go quiet when faith comes up. Learn what to say in short lessons, practice with AI characters who see the world differently, and get coaching after every conversation.

Coming soon to iPhone. Free to download.

Learn it. Practice it. Then talk with a real person.

  1. Learn one idea at a time

    Lessons take four to six minutes and teach one idea each. Every lesson shows how it might sound with a friend, then checks what stuck with a short quiz.

  2. Practice with an AI character

    Talk it through with someone who sees the world differently: a thoughtful atheist, a devout Catholic, a conservative Muslim and others. They are AI characters, and they push back and ask follow-up questions the way real people do.

  3. Get coached, then go

    AI coaching replays the practice with you, using your own words. Then you have the real conversation with a friend, and log how it went.

Hear how it might sound with a friend.

Every lesson has a Conversation Lab. Their side is on the left: what they may mean. Your side is on the right: what to avoid, what to try, and a question to ask next.

Read the article on this question

From the First Conversations lesson “Christians Are Hypocrites”
What they may mean

They have someone in mind. There is a real wound here, almost always.

Don't say

Yeah but no one is perfect. Don't throw out the baby with the bathwater.

Try saying

You are right. Christians are often hypocrites, including me sometimes. The Bible itself is the toughest book ever written on Christian hypocrisy.

Then ask

Is there someone specific you have in mind? I would actually want to hear that.

Coaching after every practice conversation.

After your sixth reply the conversation wraps up, and coaching rates four skills: listening, asking questions, staying calm and explaining clearly.

  • Replayed in your own wordsCoaching quotes your replies back to you: the moments that kept the conversation open, and the moments it slipped.
  • What you could have saidFor the moment that mattered most, a better reply to use next time, and a passage to keep in mind.
  • Custom to every conversationAI writes each review fresh for the conversation you just had. Like any coach it can miss something, so weigh it against Scripture.

Also in Nosa

  • Ask AIAsk a question the moment it comes up. Answers follow Nosa's settled theology, stay inside strict guardrails, and point you to the lesson that goes deeper. It's AI, so check what matters against Scripture.
  • My peopleKeep a list of the people you are talking with and praying for, by first name only. With Pro, practice with an AI partner before a real conversation with one of them.
  • ReviewIdeas come back after 1, 3, 7, 14 and 30 days, so they stay with you.
  • Glossary99 terms, from the Kalam argument to the Euthyphro dilemma, unlocked as you learn.
  • Search and SavedSearch every lesson, term and Scripture reference. Save anything you want to reread before a real conversation.
  • A streak with a rest dayKeep a daily streak with one rest day a week. Rest is holy, so your rest day never breaks it.

Seven tracks, 98 lessons.

Start with the everyday things people say, then go as deep as you want. Every lesson also has an Expert reading with primary sources, included in Pro.

  • First Conversations

    10 lessons

    The everyday things people say, in plain words, and what to say back. Start here.

  • Foundations

    24 lessons

    What apologetics is, how to hold a conversation, and the spirit of 1 Peter 3:15.

  • Trusting the Bible

    7 lessons

    Why we have the Bible we have: manuscripts, history and the questions skeptics ask.

  • Atheism, Doubt & Culture

    29 lessons

    Evil, meaning, the resurrection, science and the cultural questions you keep hearing.

  • Deconstruction & Church Hurt

    8 lessons

    For the friend who is deconstructing, or the believer who was hurt and is barely holding on.

  • Islam

    10 lessons

    Talking with Muslim friends, family and coworkers about the Quran, the Trinity and the cross.

  • Roman Catholicism

    10 lessons

    Authority, Mary, the papacy and justification, in honest conversations with Catholic friends.

Written from historic Christian orthodoxy: broadly evangelical, rooted in Scripture and Reformed-informed, for any thoughtful Christian.

Start free. Add Pro when you want everything.

Free includes 29 lessons and real practice every month.

Free

$0

No subscription needed

  • All 10 First Conversations lessons
  • Foundations lessons 1 to 9, including the five Posture lessons
  • The first two lessons of every other track
  • 3 practice conversations and 5 Ask AI questions a month
  • 3 AI characters: Ahmed, Maria and Jordan
  • Review, the glossary, search and Saved

Pro

$9.99 a month

or $59.99 a year

  • All 98 lessons in seven tracks
  • Expert reading on every lesson, with primary sources
  • All six AI characters, and Hard difficulty
  • Practice and Ask AI with no monthly limit
  • Coaching from a stronger AI model
  • Prep a real conversation with someone from My people

The yearly plan starts with a 7-day free trial for new subscribers. Prices are in US dollars, and Apple sets the price in other countries. Pro has a daily fair-use limit of about 10 practice conversations and 60 questions. Subscriptions renew until you cancel in your Apple ID settings.

For churches and small groups

Nosa is made for one person and a phone, and it fits alongside a group too. A youth group or small group can work through the same track during the week, then talk about the conversations people had.

If you lead a church or group and want to try Nosa together, write to [email protected].

Articles

Short reads on apologetics and the conversations behind it.

All articles

Coming soon to iPhone.

Free to download, with Pro when you want everything.