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Open Source Portfolio Tracker for Bitcoin
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Crypto Blotter

Version 0.01 Alpha

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Open Source License: LICENSE

Contributing guidelines: CONTRIBUTING.MD

Installation instructions: INSTALL.MD

Crypto Blotter (CB) is a portfolio tracking tool. It includes position monitoring and other analytics. The main reason that led me to develop this tool is to better manage cash inflows and outflows from digital positions while maintaining my data locally.

CB monitors daily Net Asset Value (NAV). Similar to how a fund calculates performance. So it's always tracking performance relative to current exposure.

Sample Portfolio View:

Front Page

Why NAV is important?

NAV is particularly important to anyone #stackingsats since it tracks performance relative to current capital allocated. For example, a portfolio going from $100 to $200 may seem like it 2x but the performance really depends if any new capital was invested or divested during this period. NAV adjusts for cash inflows and outflows.

Trade Pairs

Cryptoblotter is structured so that, by default, trades are included in pairs. This is similar to accounting entries where a credit and a debit are included as separate entries. This is helpful so you can track your positions (assets) and your cash flows. By doing this, it's easier to see how much fiat was deployed. It's particularly helpful in determining your historical average cost. More info on how to import transactions can be found here: CSV import details. You may also open the database and just paste the transactions.


Please note that this is a "hobby project". There is no guarantee that the information and analytics are correct. Also expect no customer support. Issues are encouraged to be raised through GitHub but they will be answered on a best efforts basis.

Any issues, suggestions or comments should be done at Github ISSUES page.

Disclaimer: I am not a developer. Code is not optimal. Will probably run slower than potentially possible. Code enhancements and suggestions are welcome! I am also a beginner on GitHub so I may deviate from what is standard. If you see potential for improvement, please let me know.

Installation instructions

Although Crypto Blotter can be accessed at, we highly encourage users to run locally. This would give the user control over database (stored locally) and on whether on not to upgrade to new versions. When using the online version, feel free to use a random username for privacy. Use the online version for testing and install locally later as recommended. Click here for installation instructions.


Most portfolio tracking tools ask for personal information and may track your IP and other information. My experience is that even those who say they don't, may have log files at their systems that do track your IP and could be linked to your data. By cloning CB and running locally you reduce the risk of linkage of your IP, portfolio info and other information.

Asset and Liability tracking

Different than most portfolio tracking tools, CB tracks both sides of transactions: the crypto asset side and the fiat side. This helps in analyzing cost basis, historical cash flows and fiat to crypto conversions along time.

NAV Tracking

Another major difference is the concept of tracking Net Asset Value (NAV). NAV tracks performance based on amount of capital allocated. For example, a portfolio starts at $100.00 on day 0. On day 1, there is a capital inflow of an additional $50.00. Now, if on day 2, the Portfolio value is $200, it's easy to conclude that there's a $50.00 profit. But in terms of % appreciation, there are different ways to calculate performance. CB Calculates a daily NAV (starting at 100 on day zero). In this example:

Day Portfolio Value* Cash Flow NAV Performance
0 $0.00 + $100.00 100 --
1 $110.00 + $50.00 110 +10.00% (1)
2 $200.00 None 125 +25.00% (2)
* Portfolio Market Value at beginning of day
(1) 10% = 110 / 100 - 1
(2) 25% = 200 / (110 + 50) - 1

Tracking NAV is particularly helpful when #stackingsats. It calculates performance based on capital invested at any given time. A portfolio starting at $100 and ending at $200 at a given time frame, at first sight, may seem like is +100% but that depends entirely on amount of capital invested along that time frame.


- Why include other Crypto Assets and not only Bitcoin?

We believe CB actually helps users realize the value of a Bitcoin only portfolio. But that's our opinion. We preferred to give users the ability to check their whole portfolio and provide them with the tools to assess how much better (or maybe worse) they would have been with a Bitcoin only portfolio. Most crypto investors go through a period of investing in other assets. The quicker they realize this is a losing strategy, the better. We hope these tools help them learn quicker.

- Why is NAV a better way to track a portfolio?

It takes into account deposits and withdraws. See table at NAV Tracking for more info.

- Is there a mobile version available?

Not at this time.

- Do I need to run it locally or is there a website I can use? has a running version but we encourage users to run locally on their machines to better control their data.

- On the remote version at, what kind of information is gathered?

The debug.log file at the host we are using (Heroku) logs the IP addresses accessing the website. Also, username is stored at the database. Use the website just for testing. We encourage users of the website to not use their real e-mail address (use a burner only for password recovery). This software is designed to be ran locally at your machine.

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