Comparison

Prelude Therapy prep vs Rheii

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Prelude Therapy prep

This AI-powered companion helps you prepare for therapy sessions by providing a private space to reflect on your week. It uses local processing to transcribe your thoughts, identify emotional patterns, and generate session summaries, all without sending your data to the cloud.

Highlights
  • Voice-to-Insight transcription
  • Session summary generation
  • Emotional arc visualization
  • Identification of recurring themes
  • Local AI processing
  • No account required
Features
Read full description

Stop walking into therapy sessions wondering where to start. Prelude is a private cognitive companion that helps you bridge the gap between your daily life and your therapeutic breakthroughs. Built exclusively for iOS, Prelude uses Apple Foundation Models to provide a secure, voice-first reflection space. Speak freely about your week and our local AI agent asks gentle, probing questions to help you uncover the "why" behind your "what." [Key Features] • Voice-to-Insight: High-fidelity, local transcription turns your raw thoughts into structured themes. • Session Briefs: Automatically generate a concise summary of your week’s emotional arc to share with your therapist. • The Emotional Arc: Visualize patterns in your mood across multiple sessions without ever sending data to a server. • Recurring Themes: Identify the core issues like workload anxiety or relationship goals before you step into the room. [The Privacy Pledge] We believe your mental health data is your most sensitive asset. • No Cloud: All AI processing happens on your iPhone. • No Accounts: No login required. No tracking. No data leakage. • Free Forever: This version of Prelude is a Billionware gift to the mental health community. End user license agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Rheii

Features
Read full description

We all hold a vision of who we want to become. But it's hard to grow when you can't see your own patterns. Rheii is a journal that acts as a mirror to yourself, so you can finally see what's shaping you over time. The person you're becoming shouldn't be just a feeling, but something you can actually see. Simply dump your thoughts, and let Rheii handle the rest. 1. Recurring Themes — See the patterns you keep returning to, and what they're telling you about yourself. 2. Your Life in Motion — Watch where things are growing, easing, or demanding your attention. 3. Life Domains — Explore how different areas of your life intertwine and impact one another, across Work, Relationships, Self & Identity, and your Energy. 4. Your own Growth Garden — Receive personalized suggestions for new habits, goals, or ideas. Set intentions, complete activities, and build your growth garden. 5. Personalized Prompts & Weekly Summaries — Peviews of your week and daily prompts that get you thinking in new ways. Rheii is for those ready to close the gap between where they are and where they want to be. You already know more than you think! Rheii is designed for adults aged 18 and over. Rheii uses AI to support reflection, journaling, and personal growth. AI-generated responses can be inaccurate or incomplete and should not be treated as professional advice. Rheii is not a medical service and does not provide medical, mental-health, psychological, or diagnostic advice. Using Rheii does not create a therapist–client, doctor–patient, or other professional relationship. Do not use Rheii as a substitute for qualified care, and do not delay seeking professional support because of anything shared in the app. Rheii is not for emergencies or crisis support. If you may be in immediate danger, are considering harming yourself or someone else, or need urgent help, contact local emergency services or a qualified crisis-support provider right away. Terms of Use: https://www.rheii.com/terms

Screenshots

Prelude Therapy prep4 screens
Rheii4 screens

Verdict

The call

The clearest difference is update cadence: Rheii at every 5 days against Prelude Therapy prep's every 3 weeks. Rheii also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Prelude Therapy prep ships an update every 3 weeks, Rheii every 5 days. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

Scorecard2 real differences · 8 level
Prelude Therapy prep versus Rheii: the parameters behind the verdict, then further details
ParameterPrelude Therapy prepRheii
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size3 MB27 MB
Age rating12+17+
DeveloperUgochukwu NwuneHye Jin Kwon

In-app purchases

None

Prelude Therapy prep

No in-app purchases

None

Rheii

No in-app purchases

Questions

Is Prelude Therapy prep free?
Prelude Therapy prep is free to download, with no in-app purchases.
Is Rheii free?
Rheii is free to download, with no in-app purchases.
Do Prelude Therapy prep or Rheii have ads?
Neither Prelude Therapy prep nor Rheii shows ads.
Which is updated more often, Prelude Therapy prep or Rheii?
Prelude Therapy prep ships an update every 3 weeks, and Rheii every 5 days. Most recently, Prelude Therapy prep was updated on October 24, 2026 and Rheii on October 22, 2026.

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