Inbox Zero vs TopicFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Inbox Zero
This AI-powered assistant helps you manage your email inbox efficiently. It prioritizes important messages, drafts replies in your style, and helps you unsubscribe from unwanted newsletters. Automate email handling with custom rules and stay in control of your communications.
- Prioritize important emails
- Draft AI-assisted replies
- Unsubscribe from newsletters
- Bulk archive emails
- Create custom automation rules
- Manage multiple Gmail accounts
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Get through your inbox without living in it. Inbox Zero surfaces what matters today, prepares replies in your voice, and cleans up newsletters and low-priority mail in a few taps. START WITH WHAT MATTERS Open Today to see the messages that need a reply and the low-priority email that is safe to clean. No digging through a crowded inbox. REPLY FASTER Review complete threads, use a ready-to-send draft, revise it with AI, attach files, and send from your phone. CLEAR THE NOISE Group newsletters and noisy email by sender or category. Archive in bulk, unsubscribe in a tap, and keep the senders you still want. AUTOMATE IN PLAIN ENGLISH Tell the assistant how email should be handled. Create custom rules for labeling, archiving, forwarding, notifications, and draft replies. STAY IN CONTROL Review what the assistant changed, undo recent actions, and switch between connected Gmail accounts. Inbox Zero is built for professionals who get too much email and want a calmer, faster way to manage it. Inbox Zero requires a paid subscription. New users receive a 7-day free trial. Monthly and annual plans renew automatically unless canceled at least 24 hours before the end of the current billing period. Manage or cancel your subscription in your Apple ID account settings. Privacy Policy: https://www.getinboxzero.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
TopicFlow
This app transforms AI conversations into structured, reusable notes, plans, and summaries. It allows users to branch discussions for focused follow-ups and capture key ideas before they are lost. Organize your AI-generated content locally and export it when ready.
- Transform AI chats into reusable notes
- Branch conversations for focused follow-ups
- Capture and organize key ideas
- Refocus AI discussions without re-prompting
- Export and share selected content
- Local topic history organization
- Connect own AI provider keys
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TopicFlow turns AI chats into reusable notes, plans, outlines, decisions, and summaries. Instead of leaving every AI conversation as one long thread, TopicFlow gives your thinking structure. Keep your main line clear, branch into focused follow-up chats, then bring the strongest results back into reusable work. What you can do with TopicFlow: - Capture ideas before they disappear from long chat threads. - Branch AI chats for questions, alternatives, research notes, and next steps. - Refocus a conversation without rewriting prompts from scratch. - Turn selected discussion into notes, plans, requirements, decision records, or summaries. - Organize topic history locally on your device. - Use TopicFlow subscription access for DeepSeek-powered AI inside the app. - Export and share only when you choose. - Back up to your own iCloud or Google Drive app data space when backup is enabled. TopicFlow is built for writers, founders, builders, students, and independent thinkers who want AI conversations to produce durable work instead of disposable chat history. Important: TopicFlow subscription access unlocks the app workflow and hosted DeepSeek-powered AI features. AI availability, quotas, fees, rate limits, output rules, and terms may still be governed by DeepSeek and app store purchase rules. Terms of Use (EULA): https://specaxe.com/terms
Screenshots
Verdict
The clearest difference is rating: TopicFlow at 5.0 against Inbox Zero's 1.0. TopicFlow also leads on monetization model (freemium vs subscription). On price, ratings volume, update cadence and ads 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. Inbox Zero sells 2 in-app purchases, starting at $19.99 per month and TopicFlow sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
TopicFlow holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Inbox Zero ships an update weekly, TopicFlow every 9 days. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.
| Parameter | Inbox Zero | TopicFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 1 | 1 |
| Update frequency | Weekly — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 57 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Inbox Zero Inc. | 亦君 潘 |
In-app purchases
Inbox Zero
- Inbox Zero Starter Monthly$19.991 Month
- Inbox Zero Starter Annual$199.991 Year
TopicFlow
- TopicFlow Monthly Subscription$4.991 Month
- TopicFlow Yearly Subscription$29.991 Year
- TopicFlow Lifetime Access$69.99








