Comparison

Zulip vs DueFlow

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

Head to head
About

Zulip

This team chat application allows users to read and respond to messages within their original context, helping maintain focus. It supports teams of all sizes, from small groups to large organizations, and is 100% open-source.

Highlights
  • Contextual message reading and responding
  • Topic-based organization
  • Focus maintenance
  • Supports teams of all sizes
  • 100% open-source
  • Cloud or self-hosted options
Features
Read full description

Zulip (https://zulip.com/) helps teams of all sizes be more productive together, from a few friends hacking on a new idea, to globally distributed organizations with hundreds of people tackling the world's hardest problems. Unlike other chat apps, Zulip lets you read and respond to every message in context, no matter when it was sent. Maintain your focus and then catch up on your own time, reading the topics you care about, and skimming or skipping the rest. Like everything Zulip, this official Zulip mobile app is 100% open-source software: https://github.com/zulip/zulip-flutter . Thank you to the hundreds of contributors who have made Zulip what it is! Zulip is available as a managed cloud service or a self-hosted solution. Please send questions, comments, and bug reports to support@zulip.com, or tweet @zulip.

About

DueFlow

Features
Read full description

The $99 charge you forgot you agreed to. Annual renewals are the ones that get you. A monthly subscription turns up in your bank feed often enough to stay familiar. A yearly one arrives eleven months after you stopped thinking about it. DueFlow keeps every repeating cost in one calm list and tells you before it renews — with no bank login, no account, and no ads. WHAT'S DUE, FIRST Open the app and see what is charging this week or this month, with a running total in each currency you use. Overdue sits at the top, today's charges next, then the rest as a quiet list. No dashboard to interpret. REMINDERS THAT KEEP WORKING Pick 7, 3, 1 or 0 days before a charge. Reminders are scheduled on your phone, so they arrive whether or not you have opened the app recently. MORE THAN SUBSCRIPTIONS Rent, insurance, phone plans, gym memberships, domain names, school fees, car payments — anything that comes back. Weekly, monthly, yearly, or every N days. MULTIPLE CURRENCIES, NO GUESSWORK Living between countries? Keep each cost in the currency you actually pay. DueFlow totals every currency separately and never invents an exchange rate. YOUR DATA STAYS ON YOUR PHONE No account. No sign-up. No bank connection. Nothing is uploaded, because there is no server to upload it to. Export a full backup to Files or iCloud Drive whenever you like, and restore it on a new phone. FREE, AND STAYING THAT WAY Unlimited costs. No ads. No paywall. No subscription to keep track of your subscriptions. ALSO IN THE APP • Add a cost in seconds, with defaults that remember how you work • Swipe to mark paid — the next due date advances on its own • A cost due on the 31st stays on the 31st, even after February • Pause anything you have cancelled instead of deleting it • 18 categories, so the list reads at a glance • Light and dark, following your system setting DueFlow does not connect to your bank, does not ask who you are, and does not send you anywhere else. It answers one question well: what is coming out of your account, and when.

Screenshots

Zulip3 screens
DueFlow4 screens

Verdict

The call

Zulip and DueFlow are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Zulip ships an update monthly, DueFlow every 3 weeks. The most recent releases landed on November 6, 2026 and October 29, 2026 respectively.

ScorecardNo meaningful differences
Zulip versus DueFlow: the parameters behind the verdict, then further details
ParameterZulipDueFlow
PriceFreeFree
Rating3.7 (16 ratings) — better—
Positive reviews39.3% of reviews—
Number of ratings16 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size41 MB27 MB
Age rating12+4+
DeveloperKandra Labs, Inc.Abduvokhid Akhmedov

In-app purchases

None

Zulip

No in-app purchases

None

DueFlow

No in-app purchases

Questions

Is Zulip free?
Zulip is free to download, with no in-app purchases.
Is DueFlow free?
DueFlow is free to download, with no in-app purchases.
Do Zulip or DueFlow have ads?
Neither Zulip nor DueFlow shows ads.
Which is updated more often, Zulip or DueFlow?
Zulip ships an update monthly, and DueFlow every 3 weeks. Most recently, Zulip was updated on November 6, 2026 and DueFlow on October 29, 2026.

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