+ 23 %
Largest margin detected
[ Real-time USD/BRL intelligence ]
The dollar rate,
at its best price.
Your bank shows one USD/BRL rate. 13+ crypto exchanges show another - sometimes 3–5% cheaper. DolarMap reveals the difference in real time, so you stop overpaying for dollars. No signup. No ads. Built for Brazil.
- 100% Free
- No signup
- No ads
- LGPD compliant
BEST BUY RATE
R$ 4.99
Binance · USDT
Alert triggered USDT 2.50% cheaper on Bybit
YOUR BANK R$ 5.07 USD/BRL rate
Performance · last 60 days
The app that found dollars 23% cheaper than the bank - in real time.
On March 22, 2026 at 10:00 AM, while most Brazilians were buying dollars at the bank's daily rate, DolarMap users got an alert: USDT was 23% cheaper on one exchange. Those who acted with R$ 1,000 walked away with R$ 1,230 in purchasing power - in minutes.
~6 h
Daily average with arbitrage
− 3.98 %
Below bank rate
5
Profitable alerts
Asleep when the windows opened? With DolarMap, never again.
The problem
The market is opaque.
We make it transparent.
Hidden premiums
Buying at a major bank while a crypto exchange offers the same dollar equivalent 3% cheaper - invisible to many, expensive for all.
Lost returns
Selling assets when the premium is low because you didn't have real-time, multi-platform data at the moment of the trade.
Manual monitoring
Opening five apps to compare prices every time. A full-time job that ends with the same stale number on the screen.
Invisible windows
Arbitrage opportunities last seconds. Without a 24/7 engine reading every order book, they pass you by in silence.
[ 01 · Buy Mode ]
Find the best
entry price.
Compare buy rates across 13 exchanges in real time. We weight the order book by liquidity, so you see the price you'd actually pay for $100 - not just the top-of-book number that vanishes when you click.
- Real order book
- Execution price
- All exchanges
[ 02 · Sell Mode ]
Maximize your
BRL returns.
Selling stablecoins? Instantly see which Brazilian exchange is paying the highest rate for your dollar right now. The spread between platforms can mean hundreds of reais difference per thousand traded.
- Buy ranking
- Real-time deltas
- Includes fees
[ 03 · Arbitrage ]
Spot the spread
before it closes.
DolarMap cross-references all 13 platforms simultaneously, revealing raw arbitrage opportunities the moment they appear. We read the full book to show you the margin you can actually execute.
- Real execution
- Multi-exchange
- Live margins
[ 04 · Alerts ]
Never miss
the right rate.
Set a target price. When any of the 13 exchanges crosses your threshold, a push notification hits your phone at that exact moment - no need to open the app, sign up, or share personal data.
- Per exchange
- Instant push
- No signup
[ 05 · Ranking ]
Total transparency.
Market-wide data.
A panoramic view of every exchange we monitor - straight from official APIs. Spread, payout, fees, and trust score, ranked side by side, with no editorial bias or affiliate links.
- Direct APIs
- Live scoring
- No bias
Engine room
From raw data
to actionable insight.
A multi-layer pipeline turns 13 APIs into clean, executable prices on your phone.
- 01
Multi-exchange ingestion
13+ APIs polled continuously - Binance, OKX, Bybit, Mercado Bitcoin, Foxbit, Bitso and more - alongside the day's official PTAX rate.
- 02
Liquidity-aware pricing
In shallow markets, we compute the price for a real $100 trade. You see what you'd actually pay - not a phantom number.
- 03
Global edge delivery
Cached at the Cloudflare edge across every region. Your phone gets a fresh response in milliseconds, with high availability.
- 04
Instant push
When your target is hit, the push notification reaches your phone in under two seconds - even with the app closed or screen locked.
Coverage
Every platform that matters in Brazil.
We track every exchange a Brazilian can realistically use - plus the bank's daily rates.
- Binance
- OKX
- KuCoin
- Bybit
- Bitget
- MEXC
- Mercado Bitcoin
- Foxbit
- Bitso
- NovaDAX
- BitPreço
- BrasilBitcoin
- Coinext
- Bank rate (PTAX)
The official rate that anchors FX in Brazil - the benchmark against which every exchange is measured.
Want spread, withdrawal, and deposit fees by exchange? Open the exchange index →
LGPD transparency
Your data is yours.
DolarMap collects no email, location, or financial data. Full LGPD compliance, by design.
Anonymous device ID
Saves your alerts locally without identifying who you are.
device.uuid Notification token only
Used exclusively to deliver the alerts you've configured.
push.token Optional Google sign-in
If you opt in, only an anonymous ID is stored - never your email.
firebase.uid No ads, no tracking
No third-party analytics SDKs. Data is never sold or rented.
ads.disabled FAQ
Common questions.
Is DolarMap really free?
Yes, 100%. No ads, no in-app purchases. Our mission is to democratize access to FX information for Brazilians.
Do I need to create an account?
No. The app uses an anonymous device ID to save your alerts. Google sign-in is optional and only serves to sync your alerts across multiple devices.
Which exchanges does DolarMap monitor?
13+ platforms: Binance, OKX, KuCoin, Bybit, Bitget, MEXC (international), plus Mercado Bitcoin, Bitso, BitPreço, Foxbit, NovaDAX, BrasilBitcoin and Coinext (Brazilian). We monitor platforms that offer an open order book for USD-pegged assets (USDT/USDC), where users can set limit prices. Exchanges that only offer instant buy/sell buttons without a visible order book are not included.
Are prices real-time?
Near real-time. Prices refresh approximately every 2 minutes. For low-liquidity markets, we use the full order book to show a more realistic execution price instead of just the top of the book.
Does DolarMap give financial advice?
No. DolarMap provides market data for informational purposes only. We are not financial advisors, a brokerage, or an FX service. Always consult a qualified professional before trading.
What data does the app collect about me?
Only what's needed to work: an anonymous device ID (to save your alerts) and a push token (to deliver them). If you use Google sign-in, only an anonymous user ID is stored - never your email. See the Privacy Policy.
How do I contact support?
Email support@bitsark.com - replies within 24h on business days. Or visit our support page.
Coming soon to Android · iOS shortly after
Stop guessing.
Start monitoring.
Free, private, real-time. Download DolarMap and never miss a rate that matters.
Android first · iOS coming soon · No card, ever