Comparison

Heatmap Studio vs Doodle Schedule

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

Head to head
About

Heatmap Studio

Features
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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
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Doodle Schedule โ€” Your Calendar, Your Canvas A new kind of doodle calendar, designed iPhone-first โ€” and fully at home on iPad too. Doodle Schedule turns your monthly calendar into a handwritten journal. Instead of typing plain events into boxes, draw, write, and decorate your days the way you would on paper โ€” but with the flexibility of digital. Draw and write, right on the calendar Use Apple Pencil or your finger to sketch, highlight, and jot notes directly on any month or day. Add typed text in a choice of fonts (including several bundled Chinese calligraphy styles), sized and coloured however you like. Photos and stickers, your way Drop in photos from your library, resize and rotate them freely, and decorate with floral, black-and-white, or botanical sticker sets โ€” or import your own custom image stickers. A page that feels like paper Choose from blank, cream, grid, lined, dot-grid, and more background styles for both your month and day pages โ€” so your calendar can look and feel exactly the way you want. See your real schedule too Doodle Schedule can show your existing Calendar events alongside your handwriting, so nothing gets lost between your plans and your doodles. Keep it, everywhere, forever Everything syncs privately across your own devices through your own iCloud account. Export any month or day as an image, or generate a full PDF keepsake of your whole journal โ€” perfect for printing or archiving. Private by design Lock the app with Face ID or Touch ID. Your journal never touches our servers โ€” because we don't have any. Unlock the full app with a one-time purchase or a subscription โ€” whichever suits you. 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 (weekly vs every 12 months). On price, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท 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 weekly. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

Scorecard3 real differences ยท 3 level
Heatmap Studio versus Doodle Schedule: the parameters behind the verdict, then further details
ParameterHeatmap StudioDoodle Schedule
PriceFreeFree
Update frequencyEvery 12 monthsWeekly โ€” better
AdsYesNo โ€” better
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 โ€” better18.0
Further details โ€” not scored
Size5 MB47 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 weekly. Most recently, Heatmap Studio was updated on October 20, 2026 and Doodle Schedule on October 13, 2026.

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