Comparison

ChatInbox vs 1Stack Stellar

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

Head to head
About

ChatInbox

This app reimagines your email by organizing it around people, not dates. View all conversations with a contact in a chat-style format, making it easy to find past messages and attachments. It supports multiple email accounts and devices, offering a streamlined inbox experience.

Highlights
  • Contact-centered inbox
  • All accounts in one inbox
  • Smart contact grouping
  • Attachments by person
  • Calendar view
  • Email reminders
Features
Read full description

In a traditional inbox, emails from the people who matter most get buried under everything else. ChatInbox puts people first — grouping every message by contact, so each person's conversation is always one tap away. Tap a contact. See everything you've ever exchanged — messages, attachments, history — all in one clean, chat-style view. No more hunting through a chronological pile of unread mail to find that one message from your client, your accountant, or your kid's school. If you've ever wished email worked like iMessage — but for every account, every provider, all in one place — ChatInbox is what you've been looking for. CONTACT-CENTERED INBOX Every email is grouped by sender. Your contact list shows the most recent conversation first, each person appearing only once. Open a contact to see your full history, displayed as a natural back-and-forth conversation. UNIFIED ACCOUNTS Connect Gmail, Outlook, iCloud, and any IMAP account. All your email, all your contacts, one inbox — synced across iPhone, iPad, and Mac. SMART CONTACT GROUPING ChatInbox automatically groups related contacts — airlines, hotels, online shopping, subscriptions — so you can manage entire categories of email at once. CALENDAR EMAIL FILTER Browse your inbox by date using the built-in calendar view. Find any message from any day without searching. VISUAL ORGANIZATION Tag and organize emails on a Kanban board. Track what needs attention, what's waiting for a reply, and what's done. REMINDERS & NOTIFICATIONS Set custom reminders on any email. Get notified about messages that matter and let the rest wait. MARKDOWN COMPOSER Write polished emails with built-in Markdown formatting. Style text clearly without wrestling with toolbars. PRIVACY FIRST Your emails stay on your devices. ChatInbox connects directly to your mail servers — no third-party servers, no data mining, no tracking. Previously used Unibox and miss email grouped by sender? ChatInbox carries that vision forward — rebuilt from the ground up for modern Apple platforms, with features Unibox never had. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

1Stack Stellar

Features
Read full description

Stellar is a powerful mobile companion for managing your cloud infrastructure on the go. Designed for developers, IT professionals, and system integrators, the app provides real-time access to your Stellar cloud servers, ensuring performance, control, and flexibility wherever you are.

Screenshots

ChatInbox4 screens
1Stack Stellar3 screens

Verdict

The call

The clearest difference is in-app purchases: 1Stack Stellar at none against ChatInbox's 3. 1Stack Stellar also leads on iOS requirement (13.0 vs 17.0). ChatInbox's advantage is update cadence (every 5 days vs every 2 months). 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. ChatInbox sells 3 in-app purchases, starting at $4.99 per month. 1Stack Stellar asks for nothing beyond the download.

UpkeepUpdate frequency

ChatInbox ships an update every 5 days, 1Stack Stellar every 2 months. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 7 level
ChatInbox versus 1Stack Stellar: the parameters behind the verdict, then further details
ParameterChatInbox1Stack Stellar
PriceFreeFree
Rating4.4 (29 ratings) — better—
Positive reviews61.8% of reviews—
Number of ratings29 — better—
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.013.0 — better
Further details — not scored
Size45 MB55 MB
Age rating4+4+
DeveloperInnovatism LLCCoreTech s.r.l.

In-app purchases

3 purchases

ChatInbox

Subscriptions2
  • Monthly Premium$4.991 Month
  • Yearly Premium7 Days trial$29.991 Year
One-time1
  • Lifetime Premium$59.99
None

1Stack Stellar

No in-app purchases

Questions

Is ChatInbox free?
ChatInbox is free to download, with in-app purchases available.
Is 1Stack Stellar free?
1Stack Stellar is free to download, with no in-app purchases.
Do ChatInbox or 1Stack Stellar have ads?
Neither ChatInbox nor 1Stack Stellar shows ads.
Which is updated more often, ChatInbox or 1Stack Stellar?
ChatInbox ships an update every 5 days, and 1Stack Stellar every 2 months. Most recently, ChatInbox was updated on October 4, 2026 and 1Stack Stellar on October 10, 2026.

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