# What is Privatefolio?

*The Free* and Open-source Portfolio Tracker — All your crypto assets in one place*

By [Privatefolio](https://paragraph.com/@privatefolio) · 2024-04-20

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Privatefolio lets you track your assets across blockchains and exchanges.

Import your data and let the app do the rest — calculate your historical net worth, profits, losses, taxes and more.

How?
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Privatefolio is a local-first app, there is no server you data needs to travel to, it all happens right into your browser.

It leverages three kinds of public APIs:

1.  APIs for asset prices: Binance, Coinbase & DeFi-Llama — Redstone, Pyth coming soon.
    
2.  APIs for asset metadata: Coingecko (such as logo images, websites, descriptions).
    
3.  APIs for user data: Etherscan, Binance Account API.
    

It also makes use of [IndexedDB](https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API), which allows for high amounts of data to be stored in the browser. How much? Chrome and Chromium-based browsers allow up to 80% of disk space, i.e. on a 500GB laptop a web app can use a maximum of 400GB.

Does it scale?
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Using public APIs can be challenging, for example Coingecko's stingy free tier, nonetheless, with the use of a local cache (which works ok for metadata) we can get good user experience.

Fetching historical asset prices using Coinbase & Binance scales even if you have transacted **hundreds** of assets, for example, if you fetch the _all_ daily candles of 100 assets for the past 6 years within the _same minute_, you would only use 10% of Binance's rate limit.

Fetching user data using Etherscan works great even for users with **millions** of transactions. Their public API allows up to 5 calls per second and 1 call can retrieve up to **10,000 records**. Binance on the other hand is quite limiting and syncing an account can take many hours, but this is a challenge shared by all the portfolio trackers on the market.

Read more about rate limits on [GitHub](https://github.com/kernelwhisperer/privatefolio/blob/main/DESIGN.md).

The answer is **yes**.

Why?
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Back in November 2023 I was looking for other options beyond [delta.app](http://delta.app) to use as a portfolio tracker, that is because:

1.  I have to check 3 different apps to get an overview of my assets.
    
2.  Delta reports my Binance balances inaccurately (it ignores Futures data).
    
3.  I cannot create a pull request and extend Delta.
    
4.  Other open-source alternatives like [rotki.com](http://rotki.com) lack good UI/UX.
    

In October 2023, the TradingView team has released a plugin system for their amazing open-source charting library called [lightweight-charts](https://github.com/tradingview/lightweight-charts/releases/tag/v4.1.0). This library is what powers Privatefolio today and what made features like measuring an arbitrary net worth change possible:

![](https://storage.googleapis.com/papyrus_images/cff98241525c00af2469014a9753a356.png)

Demo of the Measure cursor

What's next?
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If there is enough interest from people to use this product I will continue hacking on it.

You can reach out via email at [hello@danielconstantin.net](mailto:hello@danielconstantin.net), start a discussion on [Discord](https://paragraph.xyz/discord), or message me on [Twitter](https://twitter.com/kernelwhisperer).

Please share any positive feedback, negative feedback, thoughts or ideas.

What would **you** like to see next?

Consider donating through Gitcoin
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Privatefolio is participating in GG20. Donations will be matched using a quadratic funding mechanism, hence, small donations can have a big impact.

GG20 takes place from April 26 - May 7, 2024.

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*Originally published on [Privatefolio](https://paragraph.com/@privatefolio/what-is-privatefolio)*