Comparison

Inbox Zero vs TopicFlow

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

Head to head
About

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.

Highlights
  • Prioritize important emails
  • Draft AI-assisted replies
  • Unsubscribe from newsletters
  • Bulk archive emails
  • Create custom automation rules
  • Manage multiple Gmail accounts
Features
Read full description

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/

About

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.

Highlights
  • 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
Features
Read full description

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

Inbox Zero4 screens
TopicFlow4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Inbox Zero ships an update weekly, TopicFlow every 9 days. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

Scorecard2 real differences · 7 level
Inbox Zero versus TopicFlow: the parameters behind the verdict, then further details
ParameterInbox ZeroTopicFlow
PriceFreeFree
Rating1.0 (1 ratings)5.0 (1 ratings) — better
Number of ratings11
Update frequencyWeekly — betterEvery 9 days
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFreemium — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size57 MB67 MB
Age rating4+4+
DeveloperInbox Zero Inc.亦君 潘

In-app purchases

2 purchases

Inbox Zero

Subscriptions2
  • Inbox Zero Starter Monthly$19.991 Month
  • Inbox Zero Starter Annual$199.991 Year
3 purchases

TopicFlow

Subscriptions2
  • TopicFlow Monthly Subscription$4.991 Month
  • TopicFlow Yearly Subscription$29.991 Year
One-time1
  • TopicFlow Lifetime Access$69.99

Questions

Is Inbox Zero free?
Inbox Zero is free to download, with in-app purchases available.
Is TopicFlow free?
TopicFlow is free to download, with in-app purchases available.
Which has better reviews, Inbox Zero or TopicFlow?
TopicFlow is rated higher. Inbox Zero averages 1.0 out of 5 from 1 ratings, while TopicFlow averages 5.0 from 1 ratings.
Do Inbox Zero or TopicFlow have ads?
Neither Inbox Zero nor TopicFlow shows ads.
Which is updated more often, Inbox Zero or TopicFlow?
Inbox Zero ships an update weekly, and TopicFlow every 9 days. Most recently, Inbox Zero was updated on October 3, 2026 and TopicFlow on September 28, 2026.

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