Comparison

Underload vs Calda

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

Head to head
About

Underload

This productivity app helps you focus by displaying only one task at a time from your to-do list. It syncs seamlessly with Apple Reminders, allowing you to manage tasks across all your devices and use familiar voice commands and shortcuts.

Highlights
  • Single task display
  • Syncs with Apple Reminders
  • Cross-device synchronization
  • Supports Siri and Shortcuts
  • Linear task progression
Features
Read full description

It's all in the title. Do you ever feel overwhelmed by the sheer number of tasks on your to-do list? Adding all your tasks only to be faced with a seemingly endless list can make it hard to get anything done. That's why I created Underload, a to-do list app for iPhone, iPad, and Mac that only shows you one task at a time. You can add all your tasks, but you'll only see the next one you need to tackle. You get a clear, linear path forward, a singular focus. Best part is, it two-way syncs with Apple Reminders, so your tasks sync across all your devices and you can keep using Siri, HomePod, Shortcuts, and whatever other integrations you're used to to manage tasks. Privacy Policy: https://www.underload.app/privacypolicy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Calda

This app combines your calendar and journal, allowing you to manage your schedule and record daily memories. It offers seamless syncing with existing calendars and provides multiple ways to capture moments, transforming your past into a personalized visual diary.

Highlights
  • Calendar and journal integration
  • Syncs with Apple Calendar
  • Morning schedule briefings
  • Capture moments with text, photos, drawings
  • Dual schedule and record views
  • Unified monthly and yearly views
  • Home screen widgets
Features
Read full description

Calda: Calendar. Note. Simple. Manage your schedule, preserve your day. Meet Calda — the calendar that notes your life. ◆ WHO IT'S FOR - The App Hopper: Tired of switching between your calendar, a journal, and your photo gallery? - The Busy Planner: Love the idea of keeping a diary, but find daily journaling too overwhelming? - The Nostalgic Soul: Want to flip back through past months and instantly remember, "Ah, that's what I did that day"? ◆ SCHEDULES & RECORDS - Seamless Sync: Your existing Apple Calendar events appear instantly, and changes made in Calda sync back automatically. - Morning Briefings: Start your day right with a morning notification summarizing today's schedule. - Capture the Moment: Preserve your day your way—using checklists, drawings, photos, or simple text. ◆ YOUR LIFE AT A GLANCE - Dual Views: Effortlessly switch between "Schedule View" and "Record View" to see two different faces of your calendar. - Unified Month: See your plans and memories side-by-side in the monthly view. - A Yearly Album: Watch 12 months come together to form a beautiful, personalized book of your life. ◆ WIDGETS - Home Screen Access: View today's schedule and look back at your records directly from your Home Screen. - As your records accumulate, Calda transforms into a one-of-a-kind diary crafted entirely by you. Start preserving your day, starting today!

Screenshots

Underload3 screens
Calda4 screens

Verdict

The call

The clearest difference is price: Calda at Free against Underload's $4.99. On review sentiment, update cadence, ads and in-app purchases 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

Calda is free to download; Underload costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Underload ships an update monthly, Calda every 2 weeks. The most recent releases landed on August 9, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Underload versus Calda: the parameters behind the verdict, then further details
ParameterUnderloadCalda
Price$4.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1 — better—
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size2 MB52 MB
Age rating4+4+
DeveloperAnuradha VellineniSEUNGAH JO

Customer experience

Underload

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Calda

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Underload

No in-app purchases

None

Calda

No in-app purchases

Questions

Is Underload free?
Underload costs $4.99, with no in-app purchases.
Is Calda free?
Calda is free to download, with no in-app purchases.
Do Underload or Calda have ads?
Neither Underload nor Calda shows ads.
Which is updated more often, Underload or Calda?
Underload ships an update monthly, and Calda every 2 weeks. Most recently, Underload was updated on August 9, 2026 and Calda on September 18, 2026.

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