LiveHeat vs Rub Memo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LiveHeat
This app displays real-time core body temperature directly on your Apple Watch, independent of your iPhone. It visualizes temperature zones with color-coding and a position needle, and can pair with heart rate monitors for a combined view. Track time spent in each zone and customize settings for personalized training.
- Real-time core body temperature display
- Standalone Apple Watch app
- Color-coded temperature zones
- Heart rate and temperature pairing
- Zone time tracking
- Customizable temperature and HR zones
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The only Watch app that shows your CORE body temperature in real time, no iPhone needed. STANDALONE ON YOUR WRIST Most sports sensors need your phone nearby to display data. LiveHeat connects directly to your CORE sensor over Bluetooth and streams live readings to your Apple Watch, every second, hands-free, whether your phone is in your bag or at home. 4 TEMPERATURE ZONES AT A GLANCE Color-coded zones show exactly where your body is: - Baseline: normal resting temperature - Elevated: body beginning to heat - Heat Training: optimal training window - Danger: take action now A live position needle shows where you are within each zone, not just which zone you're in. HEART RATE + TEMP TOGETHER Pair a Bluetooth HR strap (Polar H10, Garmin, and others) simultaneously. See your core temp and heart rate side by side with independent zone indicators on a single screen. ZONE TIME TRACKING Track how long you've spent in each temperature zone during your session. Daily totals reset at midnight. Ideal for heat acclimatization protocols and training load monitoring. FULLY CUSTOMIZABLE Adjust temperature zone boundaries to match your physiology Set custom heart rate zone thresholds Toggle between °C and °F All settings sync instantly, no app restart needed WHO IT'S FOR Built for endurance athletes, cyclists, triathletes, and anyone using heat training or heat acclimatization protocols. If you wear a CORE sensor, this app turns your Watch into a dedicated real-time display, the one you've been waiting for. COMPATIBILITY Requires Apple Watch and a CORE body temperature sensor (by greenTEG). Compatible with any Bluetooth Low Energy heart rate monitor. Apple Watch is a trademark of Apple Inc. CORE is a trademark of greenTEG AG. This app is not affiliated with or endorsed by greenTEG AG.
Rub Memo
This app allows you to erase text by rubbing your finger over it, mimicking the feel of erasing pencil on paper. It also offers a home screen widget for quick access, reordering paragraphs, and inserting various media like tables, checklists, and drawings.
- Erase text with finger rub
- Home screen widget for notes
- Reorder paragraphs by long-press and drop
- Insert tables, checklists, images, and drawings
- Full-text search with highlighted matches
- Lock notes with Face ID/Touch ID
- Export and share as PDF
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■ Erase with Your Finger Turn on “Eraser” in the toolbar, then trace over the text you want to remove. Erase one character at a time without selecting a range. Rewrite as easily as rubbing out pencil marks on paper. If you erase too much, tap “Undo” to bring it back. ■ Meet Your Walking Cat A pixel-art cat strolls around your note screen. Choose from Calico, Black, or Robot, and enjoy 38 animations, including walking, jumping, and relaxing. Tap the cat to make it move out of your way. You can also turn it off in Settings. ■ Home Screen Widget Check the last note you opened right from your Home Screen. Tap the widget to open that note instantly. ■ More Features • Touch and hold paragraphs to move and reorder them • Insert tables, checklists, images, and hand-drawn sketches • Use the eraser to remove inserted items, including tables and images • Search all your notes with matching text highlighted • Lock individual notes with Face ID / Touch ID • Export and share notes as PDFs • Switch between Japanese and English • Adjust text size, fonts, ruled lines, and eraser width ■ No Ads, No In-App Purchases, No Account Required The app does not collect your data. Your notes are stored on your device and are never sent to external servers by the app.
Screenshots
Verdict
The clearest difference is price: Rub Memo at Free against LiveHeat's $9.99. 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
Rub Memo is free to download; LiveHeat costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LiveHeat ships an update weekly, Rub Memo every 6 days. Both last shipped on October 31, 2026.
| Parameter | LiveHeat | Rub Memo |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Nils Albertsen | seiji honda |
Customer experience
LiveHeat
Rub Memo
In-app purchases
LiveHeat
No in-app purchases
Rub Memo
No in-app purchases









