Comparison

Solmari vs Second Brain Vault

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

Head to head
About

Solmari

This AI assistant operates entirely on your device, offering private conversations, writing assistance, coding help, and brainstorming without needing an internet connection. It ensures your data never leaves your iPhone, providing a secure and offline user experience.

Highlights
  • 100% Private On-Device AI
  • Works Offline Anywhere
  • Free to Use
  • Coding Assistance
  • Writing and Editing Tools
  • Document Chatting
  • Voice Input
Features
Read full description

Solmari is a private AI assistant that runs entirely on your iPhone. Ask questions, write and edit, brainstorm, get coding help, or just chat — all without an internet connection, and without your words ever leaving your device. No account. No sign-up. No tracking. Nothing is sent to a server, because there is no server. Your conversations stay on your phone, always. WHY SOLMARI • 100% Private — Everything happens on-device. Your chats, questions, and documents never leave your iPhone. • Works Offline — No Wi-Fi, no signal, no problem. Use Solmari on a plane, on the subway, or anywhere at all. • Free — No paywalls, no subscriptions, no locked features. • On-device intelligence — Uses your iPhone's built-in intelligence where available, with a bundled model so it works on its own. WHAT YOU CAN DO • Chat naturally — Ask anything and get thoughtful answers in seconds. • Write & edit — Draft messages, emails, and posts, then polish tone and grammar. • Code — Get clean, idiomatic code with clear explanations. • Brainstorm — Generate ideas, names, plans, and outlines fast. • Learn — A patient tutor that explains things step by step. • Chat with your documents — Import a text file and ask questions about it, fully on-device. • Voice input — Speak instead of type, transcribed privately on your phone. ONE-TAP PERSONAS Switch between Assistant, Tutor, Coder, Editor, and Brainstorm modes to instantly steer how Solmari responds. PRIVATE BY DESIGN Most AI apps send everything you type to the cloud. Solmari doesn't. The AI lives on your device, so your most personal questions, drafts, and ideas stay yours — by design, not by promise. Note: On first launch, devices without built-in AI download a one-time on-device model so Solmari can run fully offline afterward. We'll notify you when it's ready. Download Solmari and experience AI that's truly yours — private, offline, and free.

About

Second Brain Vault

Features
Read full description

Second Brain Vault isn't another folder-organizing app. You just save — the on-device AI files it for you and finds it back later when you ask in plain language. A private memory vault that lives entirely on your iPhone. We're all good at saving. The real question was always "where did I put that?" Second Brain Vault flips the order: you save, the AI organizes and recalls. HOW IT WORKS • Save in one tap — a note, a photo, a voice memo, a PDF, or a web link. Anything, instantly, into your vault. • AI organizes it for you — every saved item gets a title, a summary, a category, and tags, automatically. Photos are read with OCR, voice is transcribed, PDFs and links have their text extracted. • Recall like a person — ask "that real-estate article I read last year," "the best cold-noodle place I saved," "the app idea I jotted last month," and it finds the right memory. It's hybrid retrieval — semantic meaning plus keywords plus recency — so it works even when you don't remember the exact words. • It grows with you — Insights show your top topics and saving trends, and every week the AI writes a short Retrospective of what you saved. The more you save, the higher your Brain Level. WHAT'S INSIDE • Home — today's and recent items, plus a one-line AI insight • Quick capture — five kinds: note, photo, audio, PDF, link • Natural-language Recall — hybrid semantic + keyword + recency ranking • Insights — top topics, save volume, Brain Level growth • Weekly Retrospective — an AI recap of your week of memories • Automatic categories & tags — organized without you filing anything PRIVACY BY CONSTRUCTION Everything is processed on this iPhone. Because it uses Apple's on-device AI (Foundation Models), your notes, photos, voice and documents never leave the device. No account, no server, no ads, no tracking. The only time it uses the internet is to fetch the page of a web link you choose to save. APPLE INTELLIGENCE REQUIRED Auto-organizing, natural-language search, Insights and the Retrospective run on Apple-Intelligence-capable devices. On other devices you can still save and search by keyword; the AI features show an "Apple Intelligence required" state. START FREE, UNLOCK WHEN YOU NEED IT Free: up to 100 items, full on-device AI organizing & search on all 100, every capture type, Insights and Brain Level included. Pro (₩6,600 / year): unlimited saves, iCloud backup & sync, weekly Retrospective history, and more. Lifetime (₩29,000, one-time): everything in Pro, forever, no renewal. You save it; Second Brain Vault remembers it. Drop in your first memory today. ■ Device requirements AI auto-organizing and semantic (meaning-based) search require an Apple Intelligence–capable device — iPhone 15 Pro / 15 Pro Max and iPhone 16/17 or later, iOS 26 or later. On other devices, saving and keyword search still work fully. Everything is processed on-device; nothing is ever sent off your iPhone. ■ Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://blue-code.github.io/legal/second-brain-vault/privacy.en.html

Screenshots

Solmari4 screens
Second Brain Vault4 screens

Verdict

The call

The clearest difference is in-app purchases: Solmari at none against Second Brain Vault's 1. Solmari also leads on iOS requirement (17.0 vs 26.0). On price, ads 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. Second Brain Vault sells 1 one-off in-app purchase. Solmari asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Solmari versus Second Brain Vault: the parameters behind the verdict, then further details
ParameterSolmariSecond Brain Vault
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size63 MB2 MB
Age rating17+4+
DeveloperBinaya DhakalByoungho Kim

In-app purchases

None

Solmari

No in-app purchases

1 purchases

Second Brain Vault

One-time1
  • Second Brain Vault (Lifetime)$17.99

Questions

Is Solmari free?
Solmari is free to download, with no in-app purchases.
Is Second Brain Vault free?
Second Brain Vault is free to download, with in-app purchases available.
Do Solmari or Second Brain Vault have ads?
Neither Solmari nor Second Brain Vault shows ads.

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