Heatmap Studio vs WallDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heatmap Studio
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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.
WallDay
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WallDay composes widgets over a background into your own wallpaper, and a Shortcuts automation changes it for you every day. ■ Widgets on your wallpaper · Quote — a new line every day · English words — pick your study language (Korean/Japanese) · D-day — countdown to what matters · Calendar — this month at a glance · Today — calendar and reminders combined · Habits — a daily checklist · Weather — current, weekly, hourly · Stocks and News — live · Activity and Sleep — from Health ■ Auto-changing wallpaper · Refreshes every day via Shortcuts automation · Sequential / random rotation + favorites filter ■ Background gallery · Your photos · cloud themes ■ Lock Screen Live Activity · A Lock Screen card, independent from your wallpaper ■ Full editing · Font · color · size · position · alignment · layout ■ Languages · Korean · Japanese · English No account required. Location, calendar, and health data stay on your device. ■ WallDay Pro (auto-renewable subscription) · Monthly — $3.99 / month · Yearly — $29.99 / year · For the first 24 hours after install, everything is unlocked without a subscription. After that, a subscription is required to change your background, widget, and style settings — your wallpaper keeps updating automatically either way. · Subscribing reopens every widget template, unlimited personal photos, and all colors & typefaces. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. Manage or cancel it anytime in your Apple Account settings. The subscription itself does not include an introductory free trial. Terms of Use: https://factual-verbena-760.notion.site/Terms-of-Use-BabyWaa-77b803b0a33f46868632534bcb469e3c Privacy Policy: https://factual-verbena-760.notion.site/Privacy-Policy-BabyWaa-dbbc3cae71b541caa9712caeeb1d7251
Screenshots
Verdict
The clearest difference is in-app purchases: Heatmap Studio at none against WallDay's 2. WallDay's advantage is ads (none vs shown) and update cadence (every 3 days 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
Both are free to download. WallDay sells 2 in-app purchases, starting at $3.99 per month. Heatmap Studio asks for nothing beyond the download.
Heatmap Studio ships an update every 12 months, WallDay every 3 days. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.
| Parameter | Heatmap Studio | WallDay |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 12 months | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Japality Limited | JiYeon Noh |
In-app purchases
Heatmap Studio
No in-app purchases
WallDay
- Pro Monthly$3.991 Month
- Pro Yearly$29.991 Year









