Social Tree vs Second AI Brain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Social Tree
Effortlessly remember people and conversation details with AI-powered voice notes. Find contacts by any remembered trait and get AI-generated prompts for your next interaction. Built for individuals with extensive networks.
- Fuzzy AI search for contacts
- Voice-first note capture
- AI-generated conversation starters
- Smart, auto-organized profiles
- Private, on-device storage
- Network visualization
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Who was the investor at the bar at 2am? The designer who folds paper cranes? The one who said "call me when you're in Lisbon"? You remember the person. The name is the part that goes missing. SocialTree fixes that. SAY IT ONCE Right after you meet someone, talk. "Met Bastian at the founder dinner, angel investor, surfs at dawn, wants an intro to Elio." No forms. SocialTree turns the ramble into a person card with the details that matter. WALK IN KNOWING Seeing them again? Open their card and get the recap: what you talked about, what they were building, and three things worth asking. Ask how the launch went. Ask about the marathon. SEARCH BY WHAT YOU REMEMBER Type the question in your head. "Who runs marathons?" "Who did I meet at the gym?" "Who's the VC with the rescue dog?" The right person shows up, with the reason. WHO HAVEN'T YOU SEEN IN AGES? A gentle tap before a good connection goes cold, and a follow-up when someone said something you should act on. WATCH YOUR CIRCLE GROW Every person you add is a leaf on your tree. Spin it, replay how it grew, share it as a picture or a short video, and put it on your Home Screen. ALSO IN THE BOX - Widgets, plus one-tap capture from Control Center - Calendar aware: link it (read only) and get context before a meeting - Save from anywhere: send a profile or link to SocialTree from the share sheet - Circles: see your people by the parts of your life they belong to PRIVATE BY DESIGN Your people live on your device. AI processing is opt-in, disclosed up front, and can be switched off anytime in Settings. No ads, no data sales, and anonymous analytics you can turn off. SOCIALTREE PRO Try everything free, then keep it running with a monthly or annual plan. Have an offer code from a friend? Redeem it right on the paywall. Privacy policy: https://praneelbhatia.github.io/socialtree-privacy/ Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Second AI Brain
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Second AI Brain helps you capture what matters, organize it into lasting memory and connected knowledge, and turn it into useful action. CAPTURE IN THE MOMENT Save ideas and experiences with text, voice, images, files, or links. English and Simplified Chinese speech recognition follow the language you select in Settings. MEMORY THAT STAYS USEFUL Keep short-term and long-term memories organized, searchable, and connected. Related knowledge can resurface when it becomes relevant. FROM MEMORY TO ACTION Create reminders, keep calendar context in sync, review upcoming items, and receive weather-aware alerts when related system permissions are available. HOSTED AI, NO API KEY REQUIRED A frontier multimodal flagship AI model powers text-based memory, knowledge, context, and planning through a Second AI Brain relay. An eligible three-day trial includes 5 memory/reminder uses, 1 knowledge document, and 5 knowledge Q&A. Monthly and quarterly subscribers receive 80 memory/reminder uses, 20 knowledge documents, and 80 Q&A each month. Quarterly allowances reset monthly, not all at once. A single knowledge document may contain up to 100,000 characters. Apple shows the local price before purchase. BUILT AROUND YOUR DATA Core memory, knowledge, indexes, and retrieval stay on your device or your optional private iCloud. Content needed for requested AI features passes through the relay to the third-party AI provider identified in our Privacy Policy. The relay does not retain prompt or answer content. Existing local data remains accessible after an AI trial or subscription ends. Supports iPhone, iPad, widgets, and the Share extension. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Second AI Brain at none against Social Tree's 2. Second AI Brain also leads on update cadence (every 2 days vs monthly). On price, ads, device support 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. Social Tree sells 2 in-app purchases, starting at $3.99 per month. Second AI Brain asks for nothing beyond the download.
Social Tree ships an update monthly, Second AI Brain every 2 days. Both last shipped on October 31, 2026.
| Parameter | Social Tree | Second AI Brain |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Praneel Bhatia | 曜郡 刘 |
In-app purchases
Social Tree
- SocialTree Pro1 Month trial$3.991 Month
- SocialTree Pro1 Month trial$29.991 Year
Second AI Brain
No in-app purchases









