WriteFlow vs Obius
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WriteFlow
Enhance your writing directly within any app. This AI-powered keyboard offers instant grammar correction, text rewriting, translation, and tone adjustment. Improve your messages, emails, and social media posts effortlessly.
- Instant grammar and spelling correction
- Text rewriting and paraphrasing
- Multilingual translation
- Tone adjustment (professional, friendly, etc.)
- Customizable AI prompts
- Works across multiple apps
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WriteFlow is the AI writing keyboard that fixes grammar, rewrites your message, and translates text right where you type. No copying and pasting, no switching apps. Tap one tool and your text is instantly proofread, rephrased, shortened, or restyled in the tone you want. WHY WRITEFLOW • Write better in seconds, in any app: Messages, Mail, WhatsApp, Gmail, Slack, Instagram, LinkedIn, and Notes • 50+ languages, including bilingual translation that shows the original and the translation together • Pick a tone: professional, friendly, confident, concise, or casual • Create your own custom AI prompts and pin the tools you use most WHAT YOU CAN DO • Proofread and fix grammar, spelling, and punctuation • Rewrite or paraphrase to sound clearer and more natural • Make text shorter, longer, or simpler • Reply faster with quick, relevant suggestions • Summarize long text into key points • Translate into 50+ languages HOW IT WORKS 1. Type or select your text 2. Tap a WriteFlow tool 3. Your improved text is ready to send PRIVACY Your text is processed only to complete your request and is never stored afterward. WORKS WHEREVER YOU WRITE One WriteFlow subscription works across iPhone, iPad, and Mac, so your tools go everywhere you do. FREE TO START Use WriteFlow free every day, or upgrade to Pro for unlimited access to every tool and all languages. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Obius
This app offers a visual workspace for organizing notes and ideas. It allows for reusable content blocks, color-coded sections for intent, and AI-powered features for content generation and semantic search. It prioritizes privacy with local-first storage and end-to-end encryption.
- Visual workspace for notes and ideas
- Reusable content blocks (Loops)
- Color-coded sections by intent
- AI-powered content generation and search
- Version history and snapshots
- Offline functionality and end-to-end encryption
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Obius — Notes that evolve. Designed for the way you think. Your ideas don't arrive in straight lines. Obius is a visual workspace where notes carry color, ideas connect to each other, and what you wrote yesterday folds into what you're building today. Built for founders, PMs, designers, researchers — and anyone who outgrew Apple Notes but never quite fit into Notion. LOOPS — WRITE ONCE, REUSE EVERYWHERE Drop a Loop into any note — a named, reusable content block like @launch_checklist or @weekly_review. Edit it in one place, every copy updates instantly. Perfect for running lists, shared context, and anything you reference more than once. SECTIONS THAT CARRY MEANING Every section has an intent — a color that tells you at a glance what kind of thinking lives there. Open ideas, questions you're sitting with, work in motion, issues to fix, things that are done. Five colors. Five intents. Your thinking, visible. — Drag and drop to reorder — Collapse, expand, and nest sections — Rich content: text, checklists, code, quotes, images, audio — Tap once to change a section's intent ECHOES — REMINDERS THAT BRING THE NOTE BACK Attach a time-based reminder to any Loop. Unlike calendar pings, an Echo resurfaces the full note when the moment matters — with all its context intact, not a one-line nag. OBIUS INTELLIGENCE AI that lives inside the workspace, not in another tab. — Generate full pages from a single prompt — Edit, rewrite, and refine content in place — no copy-pasting between apps — Smart titles that actually describe the page — Semantic search that finds ideas, not just keywords — Research context: pull what you need, paste, and think from there INSIGHTS THAT SURFACE WHAT MATTERS Obius watches your pages for patterns so you don't have to. Cleanup suggestions, related notes you forgot about, lists hiding in your text, and safety flags for leaked credentials or secrets. VERSION HISTORY, BUILT IN Every note quietly snapshots itself. Browse the timeline, restore any earlier version, watch your thinking evolve over time. No save button. No lost work. SHARE LIVE OR FROZEN Generate a short public link to share a live note that updates as you edit — or freeze a snapshot in time. Readable URLs. View counts. Comments optional. CALENDAR See your work across time. Plan ahead, look back, stay oriented — without leaving Obius. LOCAL-FIRST. PRIVATE BY DEFAULT. — Pages stored on your device first — Works fully offline; syncs when you reconnect — End-to-end encrypted sync — No tracking. No selling data. Not now, not ever. — Optional local-only mode for maximum privacy YOUR MIND. YOUR ARCHITECTURE. Obius isn't another notes app. It's a workspace shaped like thinking — simple enough to start in seconds, deep enough to grow with how you actually work. Designed for the way you think. Terms of Use (EULA): https://docs.google.com/document/d/e/2PACX-1vRq_bt_Z_V7ci7lS3hHLzq4QjRrDFJsJu6Ab-oedeeSakGPGcx_dJlG3EDAzdetptd21GPyEtzTxKbg/pub Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vRbJ9cYTWnyQSYeL8JrTOizC0eC-f8rhoicqh3GttTDIrbNlesR-_auwkFz2OLsTTzguDG3YLtzwnEY/pub
Screenshots
Verdict
WriteFlow and Obius are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. WriteFlow sells 3 in-app purchases, starting at $6.99 per month and Obius sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for WriteFlow against 5.0 for Obius. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
WriteFlow ships an update every 5 days, Obius weekly. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.
| Parameter | WriteFlow | Obius |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 5 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Juraj Gajdos | Demetri Hodges |
Customer experience
WriteFlow
Obius
In-app purchases
WriteFlow
- WriteFlow AI Keyboard7 Days trial$6.991 Month
- WriteFlow AI Keyboard14 Days trial$39.996 Months
- WriteFlow AI Keyboard14 Days trial$49.991 Year
Obius
- Obius Pro Founder$4.991 Month
- Obius Pro Monthly$9.991 Month
- Pro Annual$79.991 Year
- Power Pack$9.99









