Comparison

Calibrate vs DayTimer

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

Head to head
About

Calibrate

Features
Read full description

Calibrate: Time Block Planner Plan your time. Track what actually happens. See the difference. Calibrate is a focused time-blocking app that helps you understand where your time really goes. Schedule your day, run your sessions, and review the gap between intention and reality. Most productivity apps help you plan. Calibrate helps you measure, reflect, and improve — week after week, and now across the year. Whether you’re studying, building projects, learning a language, or trying to create better daily structure, Calibrate gives you a simple system to plan your time, track what actually happens, and learn from the difference Plan with clarity Create time blocks for what matters most. Design a realistic day around your priorities — work, learning, focus sessions, rest. Track effortlessly Start a block, stay focused, and let Calibrate quietly log what you really do. No clutter. No noise. Just clean, intentional tracking. Reflect meaningfully See how your days and weeks actually unfold. Discover patterns. Notice drift. Reinforce what’s working. Build a lasting rhythm Calibrate isn’t about perfect days. It’s about building consistency over time — and shaping a routine that fits your real life. Calibrate Pro — go deeper with your time Upgrade to Calibrate Pro to unlock long-term history and deeper reflection tools. Explore how your time evolves across weeks and months, spot real trends, and make better long-term adjustments. Calibrate is built for people who care about how they spend their time — and want a simple, thoughtful way to improve it. Plan less. Understand more. Build a rhythm that lasts. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

DayTimer

This app provides a minimal and calm way to structure your day with timed blocks and breaks. It allows for on-the-fly adjustments to your schedule, ensuring you can adapt to interruptions without falling behind. Save common schedules as templates for easy reuse.

Highlights
  • Timed task blocks
  • Automatic schedule re-flow
  • On-the-fly task insertion
  • Task rearrangement
  • Reusable day templates
  • Scheduled day loading
Features
Read full description

DayTimer is a calm, minimal, and private way to add structure to your day. Structure your day into simple timed blocks and breaks, then let it run - no logins, no ads, no cloud, no busy dashboards, no subscriptions. TIME MARCHES FORWARD With DayTimer, you can rearrange your tasks, adjust them, and reset them, but you cannot pause and snooze the day away. When a task runs long, or life interrupts, you can adapt your plan and keep going, instead of falling "behind" a schedule that no longer exists! A FOCUSED TIMER - Your current time block sits front and center, showing you your task and time remaining - One top to adjust, insert a break, or rearrange - No extra content, no busy screen! BUILT TO ADAPT - Task running too long or too short? Change it's length, everything else re-flows automatically. - Life is interrupting or adhoc tasks came up? Insert a task on the fly - Priorities change? Rearrange the blocks remaining in your day - You got pulled away and the day escaped you? Click a block and restart from there TEMPLATIZE - Save your standard days into reusable templates - Start a template on a tap - For predictable weekdays, set scheduled days and let them load automatically DayTimer is a free app that started as a passion project. The core functionality is all free, a one-time supporter unlock gives you a few themes and unlimited templates. Plan intentionally, adapt gracefully, keep moving.

Screenshots

Calibrate4 screens
DayTimer4 screens

Verdict

The call

The clearest difference is iOS requirement: DayTimer at 15.1 against Calibrate's 17.6. On price, 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

Both are free to download. Calibrate sells 1 one-off in-app purchase and DayTimer sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 14, 2026.

Scorecard1 real difference · 8 level
Calibrate versus DayTimer: the parameters behind the verdict, then further details
ParameterCalibrateDayTimer
PriceFreeFree
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.1 — better
Further details — not scored
Size4 MB35 MB
Age rating4+4+
DeveloperWarren PetersRajai Baboun

In-app purchases

1 purchases

Calibrate

One-time1
  • Calibrate Pro — Lifetime$9.99
4 purchases

DayTimer

One-time4
  • A Little Boost!$0.99
  • DayTimer Supporter$1.99
  • Buy me a coffee$3.99
Show 1 more
  • Lunch Tip!$5.99

Questions

Is Calibrate free?
Calibrate is free to download, with in-app purchases available.
Is DayTimer free?
DayTimer is free to download, with in-app purchases available.
Do Calibrate or DayTimer have ads?
Neither Calibrate nor DayTimer shows ads.
Which is updated more often, Calibrate or DayTimer?
Calibrate ships an update fortnightly, and DayTimer fortnightly. Most recently, Calibrate was updated on October 14, 2026 and DayTimer on October 14, 2026.

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