Comparison

Heatmap Studio vs Doodle Schedule

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

Head to head
About

Heatmap Studio

Features
Read full description

Heatmap Studio shows a table of numbers as a color heatmap. You can start from a blank grid, paste a table, or import a CSV or TSV file. You can edit cells and labels, choose colors, and view basic figures such as the minimum, maximum, and average. Projects are stored in the app on this device. You can export a PNG image or a CSV file. The colors are there to help you view the numbers. Please check important numbers yourself.

About

Doodle Schedule

Features
Read full description

Doodle Schedule turns your calendar into a hand-drawn journal. Instead of typing plain events into boxes, draw, write and decorate your days the way you would on paper, with all the flexibility of digital. DRAW AND WRITE ON YOUR CALENDAR • Sketch, highlight and jot notes on any month or day with Apple Pencil or your finger • Add typed text in a choice of fonts, including handwritten and Chinese calligraphy styles • Separate undo and redo for drawing, photos and text A JOURNAL PAGE FOR EVERY DAY • Tap any day to open its own page • Write about your day, add photos, and resize and rotate them freely STICKERS FOR EVERY MOOD • Floral, botanical and black-and-white sticker sets • Import your own images as stickers PAPER THAT FEELS REAL • Blank, cream, grid, lined, dot-grid and more, for your month and day pages YOUR REAL SCHEDULE, TOO • See your Apple Calendar events next to your doodles • Create and edit events without leaving the app • A month widget for your Home Screen shows every event as a colour bar YOURS, PRIVATELY • Syncs across your iPhone and iPad through your own iCloud account • Lock the app with Face ID or Touch ID • No accounts, no servers, no ads. Your journal never leaves your devices and your iCloud. KEEP IT FOREVER • Export any month or day as an image • Create a PDF keepsake of your whole journal to print or archive Unlock everything with a monthly or yearly subscription, each starting with a 1-month free trial, or with a one-time purchase. Privacy Policy: https://bymilly.co/doodleschedule-privacy-policy-en/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Heatmap Studio4 screens
Doodle Schedule4 screens

Verdict

The call

The clearest difference is in-app purchases: Heatmap Studio at none against Doodle Schedule's 3. Doodle Schedule's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 12 months). On price, device support and iOS requirement 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. Doodle Schedule sells 3 in-app purchases, starting at $2.99 per month. Heatmap Studio asks for nothing beyond the download.

UpkeepUpdate frequency

Heatmap Studio ships an update every 12 months, Doodle Schedule every 2 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 3 level
Heatmap Studio versus Doodle Schedule: the parameters behind the verdict, then further details
ParameterHeatmap StudioDoodle Schedule
PriceFreeFree
Update frequencyEvery 12 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size5 MB48 MB
Age rating4+4+
DeveloperJapality LimitedBY MILLY CO. LTD

In-app purchases

None

Heatmap Studio

No in-app purchases

3 purchases

Doodle Schedule

Subscriptions2
  • Monthly Subscription1 Month trial$2.991 Month
  • Yearly Subscription1 Month trial$14.991 Year
One-time1
  • Lifetime Unlock$19.99

Questions

Is Heatmap Studio free?
Heatmap Studio is free to download, with no in-app purchases.
Is Doodle Schedule free?
Doodle Schedule is free to download, with in-app purchases available.
Do Heatmap Studio or Doodle Schedule have ads?
Heatmap Studio shows ads; Doodle Schedule does not.
Which is updated more often, Heatmap Studio or Doodle Schedule?
Heatmap Studio ships an update every 12 months, and Doodle Schedule every 2 weeks. Most recently, Heatmap Studio was updated on October 20, 2026 and Doodle Schedule on October 24, 2026.

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