Know what a transfer costs before you send it.
Opensee helps you follow current blockchain network fees, compare the approximate cost of transfers, look back at how fees have changed and set local reminders to check a network again later.
Download on the App Store
Fees, not prices.
Opensee charts what the network charges you to move funds. It does not track token prices or hold any assets.
Illustration of the chart layout. Real values appear in the app.
Six tools for reading network costs
Live fee data
Current network fees for Ethereum, Bitcoin, Solana, Base and Arbitrum, refreshed so you see where each network stands right now.
Fee candlestick charts
Candles plot the history of network fees, not token prices, so you can see how costs rose and fell over time.
Cost estimates
Approximate what common operations cost on a network: a simple transfer, a token transfer, a swap and more.
Network comparison
Put networks side by side and see which one is cheaper for the kind of transfer you have in mind.
Daily local reminders
Set one daily reminder per supported asset. Opensee schedules it on your device to prompt a second look later.
Built for iPhone and iPad
Adapts to portrait and landscape, and works in Split View and Stage Manager on iPad.
Check, compare, come back later
Pick a network
Open Ethereum, Bitcoin, Solana, Base or Arbitrum and see its current fee level.
Read the history
Use the candlestick chart to see whether fees are high or low compared with recent hours and days.
Set a reminder
Not a good time to send? Set a daily local reminder for that asset and check again later.