Diary.Chat vs Supplemental
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Diary.Chat
This app helps you track your mood and thoughts with AI-powered insights and tailored prompts. Build a journaling habit with fun features and review daily summaries to understand your emotional patterns and improve mental well-being.
- Tailored journaling prompts
- AI-driven mood and thought analysis
- Daily summaries of emotional patterns
- Gamified habit building (reminders, streaks, achievements)
- Secure and private data storage
- Voice recording and image support
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TAILORED PROMPTS With tailored prompts, DiaryChat guides you to explore your feelings, making it more than just a daily journal, it's your personal mood tracker. AI INSIGHTS Get actionable insights from your AI journal that reveal patterns in your mood and thoughts, helping you improve your mental health. DAILY SUMMARIES Track your progress with DiaryChat daily summaries, which analyze your mood, emotions, and recurring themes in your daily journal. JOURNALING MADE FUN Build a daily journal habit with DiaryChat, where reminders, streaks, and achievements turn journaling into a rewarding experience. RESPECT PRIVACY Your reflections are private. Your journal entries, voice recordings, and images are stored securely. You can delete your data anytime.
Supplemental
Capture thoughts and build positive habits with AI-powered suggestions. This app helps you track emotional patterns, reinforce insights, and offers a guided phone lockout for focused reflection.
- Voice and text reflection recording
- AI-generated habit suggestions
- Emotional pattern tracking
- Guided phone lockout mode
- Insight reinforcement
- Pro features: Insight Mode, Session Briefs, AI micro-practices
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Supplemental Capture insights. Stay engaged between sessions. Walk into therapy prepared. Supplemental is a therapy companion that helps you capture insights, prepare for sessions, and build small daily practices—so progress doesn’t stop when therapy ends. Most people leave therapy feeling clear and motivated. By the next day, life gets busy. Important thoughts are forgotten, breakthroughs fade, and the things you meant to discuss never make it into your next session. Supplemental helps you hold onto what matters. Capture Before You Forget Record thoughts, emotions, breakthroughs, patterns, and questions the moment they happen using voice or text. Everything is automatically organized, so your reflections are ready whenever you need them. Walk Into Therapy Prepared Build a Session Agenda naturally throughout the week instead of trying to remember everything at the last minute. Before your appointment, generate a clear Session Brief that organizes your themes, challenges, wins, and priorities into one easy-to-read summary. Spend less time remembering. Spend more time making progress. Turn Insight Into Action After therapy, transform your biggest takeaways into personalized daily micro-practices inspired by evidence-based approaches including CBT, DBT, and mindfulness. Small actions. Real momentum. Stay Connected Between Sessions Growth doesn’t happen one hour a week. Use reminders, guided reflections, and simple daily practices to stay connected to the work you’re doing long after your therapy session ends. Supplemental Pro Unlock advanced therapy tools including: • AI-generated Session Briefs • Personalized Micro Practices • Insight Mode • Smart reminders Designed to Support Therapy — Not Replace It Supplemental is designed to complement your work with a licensed mental health professional. It helps you remember what matters, prepare for meaningful conversations, and apply therapeutic insights between sessions. Supplemental does not provide medical advice, diagnosis, or treatment and should not be used as a substitute for professional mental health care. Subscriptions Subscription options are displayed in the app before purchase. Payment is charged to your Apple ID upon confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the current billing period ends. You can manage or cancel your subscription anytime in your App Store account settings. Privacy Policy: https://supplementalprivacypolicy.carrd.co/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Diary.Chat at none against Supplemental's 2. Diary.Chat also leads on ads (none vs shown). Supplemental's advantage is ratings volume (9 vs 1) and device support (3 vs 1). On price, rating, update cadence and iOS requirement 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
Both are free to download. Supplemental sells 2 in-app purchases, starting at $8.99 per month. Diary.Chat asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Diary.Chat against 5.0 for Supplemental. That said, the two scores are not equally well evidenced: Supplemental has 9 ratings behind it against 1, so its average is the more settled of the two.
Diary.Chat ships an update every 8 days, Supplemental every 11 days. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.
| Parameter | Diary.Chat | Supplemental |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (9 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 9 — better |
| Update frequency | Every 8 days — better | Every 11 days |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 54 MB |
| Age rating | 17+ | 4+ |
| Developer | Underscore LLC | Andrew Mills |
Customer experience
Diary.Chat
Supplemental
In-app purchases
Diary.Chat
No in-app purchases
Supplemental
- Supplemental Pro Monthly14 Days trial$8.991 Month
- Supplemental Pro Yearly14 Days trial$59.991 Year









