Comparison

Chronogram vs SiCal

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

Head to head
About

Chronogram

This app facilitates collaborative event planning and sharing for both individuals and organizations. It allows users to discover and connect with events, manage personal schedules, and helps organizations engage their audience by publishing events directly to followers' calendars.

Highlights
  • Collaborative event creation
  • Event sharing and discovery
  • Personal event scheduling
  • Organization event publishing
  • Follow organizations of interest
  • Minimize scheduling conflicts
Features
Read full description

Personal and organizational event creation, collaboration, and sharing platform. Chronogram is an online collaborative event-sharing and customer engagement platform. Chronogram helps individual users and businesses discover and connect with each other and structure their events in a calendarized format for easy viewing, sharing, and collaboration. Chronogram helps people get events from organizations they care about published directly on their calendar. Event planning and sharing are two important steps in hosting a successful event of any size. Chronogram makes event planning, sharing, and collaboration very easy! Being able to use predictive analytics and take data-driven actions by event hosting companies can dramatically improve the discovery and reach of their target customers. Individual users can schedule their personal and family events, and manage appointments. Chronogram users can discover & follow organizations of interest. View their personal and social events - all in one calendar and never miss an RSVP. Chronogram enables organizations build targeted follower base and directly publish their events on followers’ calendar. Collaborate with other organizations & minimize scheduling conflicts.

About

SiCal

This private calendar app utilizes a decentralized network for secure storage and management of your schedule. It allows for event creation, organization across multiple calendars, and import of existing files, all without requiring a traditional account. Your data is secured by a recovery phrase for easy restoration and control.

Highlights
  • Decentralized calendar storage
  • Event creation and organization
  • Multiple calendar management
  • ICS file import
  • Event reminders and alerts
  • Restore access with recovery phrase
Features
Read full description

SiCal is a private calendar app built on the decentralized Sia network. Create, organize, and manage your schedule without relying on a traditional central server or account-based calendar platform. With SiCal, you can create and edit events, manage multiple calendars, import calendar files like ICS, and stay on top of your schedule with event reminders and alerts. Your calendar data is tied to your recovery phrase, giving you a portable way to restore access and keep control of your information. Key features: -Decentralized calendar storage powered by Sia -Create, edit, and organize events across calendars -Import existing calendar files including ICS -Event reminders and alerts -Sync support to keep your calendar up to date -Restore access with your recovery phrase -No traditional account required -SiCal is designed for people who want a calendar that is practical, mobile-friendly, and more aligned with user ownership and privacy. This app was funded by a grant from the Sia Foundation.

Screenshots

Chronogram4 screens
SiCal4 screens

Verdict

The call

The clearest difference is ratings volume: Chronogram at 17 against SiCal's 1. SiCal's advantage is iOS requirement (13.0 vs 15.6). On price, rating, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Chronogram against 5.0 for SiCal. That said, the two scores are not equally well evidenced: Chronogram has 17 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Chronogram ships an update every 2 weeks, SiCal every 9 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Chronogram versus SiCal: the parameters behind the verdict, then further details
ParameterChronogramSiCal
PriceFreeFree
Rating5.0 (17 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings17 — better1
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size37 MB33 MB
Age rating17+4+
DeveloperChronogram LLC (U.S.)Mitchell May

In-app purchases

None

Chronogram

No in-app purchases

None

SiCal

No in-app purchases

Questions

Is Chronogram free?
Chronogram is free to download, with no in-app purchases.
Is SiCal free?
SiCal is free to download, with no in-app purchases.
Which has better reviews, Chronogram or SiCal?
Chronogram and SiCal are both rated 5.0 out of 5 on the App Store, from 17 and 1 ratings respectively.
Do Chronogram or SiCal have ads?
Neither Chronogram nor SiCal shows ads.
Which is updated more often, Chronogram or SiCal?
Chronogram ships an update every 2 weeks, and SiCal every 9 days. Most recently, Chronogram was updated on October 24, 2026 and SiCal on October 25, 2026.

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