The whole market, in colour blocks.
Box size shows trading volume, colour shows RSI. Big coins stand out, and any coin entering an extreme zone gives itself away with its colour.
Crypto RSI · iPhone and Android
See the market's heat.
The RSI of hundreds of coins on a single heatmap. What is oversold, what is overbought: you see it the moment you open the app.
Free to downloadPremium free for 7 daysNo accountNo ads
thermal
Spot · Top 24
Market pulse · 1h
44.2Weak
One scale, one colour language
Blue is cold, orange is hot.
Blue is cold, orange is hot.
Nothing else to explain.
RSI measures the strength of recent price moves on a 0 to 100 scale. Thermal turns that number into colour, so you look at the market instead of reading tables.
0
30oversold line
50neutral
70overbought line
100
<30
Oversold
The price dropped hard in a short time. Shows how strong the selling pressure is.
30–70
Normal range
Balanced movement. Most of the market sits here most of the time; it shows in shades of grey.
>70
Overbought
The price rose a lot in a short time. Shows where buying pressure is running hot.
Two views
However you like to look.
Switch between the heatmap and the radar on the home screen with one tap. Your last choice is remembered and the app opens with it every time.
Neutral at the centre, extremes at the edge.
The top half is hot, the bottom half cold. The further a coin sits from the centre, the more extreme its RSI. Coins in an extreme zone glow, so your eye goes straight to them.
27.4
Oversold1-hour RSI(14)
Coin screen
Every coin, at its own temperature.
Tap a coin: a big number, its state and seven timeframes from 5 minutes to 1 week on one screen. Spot a coin that is cooling short term but still neutral on the weekly at a glance.
Saturday, 11 October
14:02
SOL is oversold now1h RSI fell below 30: 27.4
Favorites: WIF is overbought 11:481h RSI 76.8
BTC · 4h RSI 42.7 yesterday4h RSI rose above 40
Alerts
It keeps watching while your phone is in your pocket.
"Tell me when SOL drops below 30 on the 1-hour." Set the alert and close the app. Checks run on our servers, and you are notified the moment the line is crossed.
Once per crossing
No notification storms when RSI hovers around your line. The same alert does not fire again until the value moves back 3 points.
One alert for all your favourites
Get notified when any favourite enters an extreme zone, without setting one alert per coin.
Quiet hours
Don't want to be disturbed at night? No notifications are sent during the hours you choose.
What's inside
Small, but complete.
7
Timeframes
From 5 minutes to 1 week. See short and long term at once.
2
Markets
Spot and Futures USDT pairs; switch with one tap.
~1 min
Freshness
RSI is computed continuously; the app refreshes by itself while open.
700+
Coins
Top 24 by volume on the map, or top 100, or only the extremes. The full list is always one tap away.
↗
Share
Share a snapshot of a coin or of the whole market on X, WhatsApp or Telegram.
★
Favourites
Keep the coins you watch in one place, each in its own RSI colour.
Privacy
No account.
No account.
No tracking.
No ads.
We don't ask for your email and we don't know who you are. The app keeps only what your alerts need to work.
Read the privacy policyNo sign-up, no loginYour phone creates its own anonymous ID. No name, email or phone number.
No analytics, no trackingNo third-party tracking code, ad network or cookies, in the app or on this site.
Delete it and it's goneDelete the app and your alerts go with it; the record on our server is cleaned up automatically soon after.
Price
Start free.
Start free.
Go Premium if you like.
The app is free, and you see the market's heat right away. Go Premium for the whole market, 7 timeframes and more alerts. No ads on any plan.
$0
Always
- Heatmap and radar
- Top 24 coins by volume
- Spot market
- 1h and 4h timeframes
- 1 alert
- 5 favourites
$24.99
per year · about $2.08 a month
- Everything in Premium
- First 7 days free
- Cancel any time
$3.99
per month
- Everything in Premium
- Cancel any time
$49.99
one-time
- Everything in Premium
- No subscription
- Future updates
In Premium
Top 100 and extremesFull list of 700+ coins7 timeframes (5m–1W)Spot and Futures20 alertsFavorites alertQuiet hoursUnlimited favourites
Prices are in US dollars; the App Store and Google Play show them in your local currency. Subscriptions are managed and cancelled in your store account.
FAQ
Good questions
What is RSI?
RSI (Relative Strength Index) is a widely used technical indicator that measures the strength of an asset's gains and losses over the last 14 candles on a 0–100 scale. Above 70 is usually read as overbought, below 30 as oversold. Thermal uses the standard 14-period RSI.
Where does the data come from and how often is it updated?
RSI values are computed on our servers from the candle data of Binance Spot and Futures USDT pairs. They update roughly every minute as prices move, and again at every candle close. While the app is open, the screen refreshes by itself.
Do you give investment advice?
No. Thermal is an information tool and does not make buy or sell recommendations. RSI on its own is not a trading signal, and past movements do not guarantee future prices.
Why don't I need an account?
Because it isn't needed. On first launch the app creates an anonymous ID that belongs to your phone, and your alerts are linked to it. We don't ask for personal information.
How does the 7-day trial work?
Choose the yearly plan and the first 7 days are free. Cancel before the trial ends and you won't be charged; otherwise the yearly subscription starts. The trial is tied to your Apple ID or Google account and can be used once per account; deleting and reinstalling the app does not restart it.
How do I cancel my subscription?
On iPhone, Settings → your name → Subscriptions; on Android, Play Store → Profile → Payments & subscriptions → Subscriptions. There is also a "Manage subscription" link in the app's Settings screen. After cancelling, Premium stays on until the end of the period.
What if I change phones or delete the app?
Premium is tied to your Apple or Google account: install the app on your new phone with the same account and tap "Restore purchases". Alerts belong to the device and don't move over, so you'll need to set them again. Favourites and settings are stored on your device.
I'm not getting notifications. What should I do?
Check that Thermal is allowed to send notifications in your phone settings and that your quiet hours don't cover that time. There is a full checklist on the support page.
Can I get a refund?
Apple or Google take the payment, so refunds go through their process: reportaproblem.apple.com for the App Store, or your order history in the Play Store for Google Play.