Comparison

Sunsama vs Keystone

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

Head to head
About

Sunsama

This mobile app syncs with its desktop counterpart, allowing you to add tasks, review your daily plan, and view your calendar events on the go. It's designed to keep you focused and productive when away from your computer.

Highlights
  • Add tasks quickly
  • Schedule tasks on calendar
  • Review daily plan
  • View calendar events
  • Syncs with Google Calendar
  • Syncs with Outlook Calendar
Features
Read full description

*Companion app to the desktop app* You can use the Sunsama mobile app once you've planned your first day from the Sunsama desktop app. This mobile app is built as a companion to the desktop app to help you stay in sync when you're away from your desk, not as a standalone replacement. *Add tasks quickly* When a new tasks comes up and you're not at your desk, quickly add it to your task list. You can schedule it onto your calendar and move it to the right spot on your list to work on it later. *Stay true to your plan* Review what you planned for the day. Create a calm, focused space to stay on top of your workload. *Synced with your calendar* Browse both your tasks and calendar events each day. Synced with Google Calendar and Outlook Calendar.

About

Keystone

Features
Read full description

Keystone gives your projects room to breathe. Keep every project, task, and plan in one calm place, then focus on what matters today. SEE THE WHOLE PICTURE Scan your active projects in a single list. Give each one an icon, priority, and phase. Open a project to work through its tasks, fold completed work away, or archive it when it's finished. PLAN TODAY AND THE WEEK Choose the projects that belong in today's plan and schedule tasks for the day. Move to Week to see each day at a glance, plan ahead, and set recurring work days for a project. A Home Screen widget keeps today's work nearby. CAPTURE WORK QUICKLY Use the command bar to add a task to a project, schedule it for today, tomorrow, or a weekday, and set project priority. You can also add directly from an expanded project. Copy open tasks or share them as a Markdown file when you need them elsewhere. YOUR DATA STAYS YOURS Keystone works offline and syncs through your private iCloud when it's available. Export and import a full data backup from Settings, or save a separate iCloud backup. There is no Keystone account, advertising, or tracking. Built for iPhone. Simple enough to open every day.

Screenshots

Sunsama4 screens
Keystone4 screens

Verdict

The call

Sunsama and Keystone 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

Sunsama ships an update every 2 weeks, Keystone fortnightly. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

ScorecardNo meaningful differences
Sunsama versus Keystone: the parameters behind the verdict, then further details
ParameterSunsamaKeystone
PriceFreeFree
Rating4.5 (490 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings490 — better—
Update frequencyEvery 2 weeks — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size75 MB4 MB
Age rating4+4+
DeveloperSUMMAY, Inc.Ionut Mocanu

Bugs and requests

Sunsama

Reported bugs

4 issues
  • App crashes on launch
  • Tasks disappearing or not syncing properly
  • Login issues with Google and other accounts
  • Unreliable mobile app performance

Requested features

5 requests
  • Improved mobile app with more features
  • Widgets and lock screen integration
  • Better task management and rescheduling options
  • AI-powered task scheduling and planning
  • Integration with more third-party apps

Keystone

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sunsama

No in-app purchases

None

Keystone

No in-app purchases

Questions

Is Sunsama free?
Sunsama is free to download, with no in-app purchases.
Is Keystone free?
Keystone is free to download, with no in-app purchases.
Do Sunsama or Keystone have ads?
Neither Sunsama nor Keystone shows ads.
Which is updated more often, Sunsama or Keystone?
Sunsama ships an update every 2 weeks, and Keystone fortnightly. Most recently, Sunsama was updated on October 15, 2026 and Keystone on October 7, 2026.

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