From field measurement to finished report - in one app
Record water measurements with their sampling sites, dates and photos. Compare series and prepare a PDF report in the same project. Start with a template or your own spreadsheet; prepare and download the project online before working offline.
After signing in, choose a template or import a spreadsheet. The core app is free for Founder accounts; see pricing for add-on terms.
Founder program · Everything is free during early access. Accounts created now will keep the core app free forever - with a permanent −50% discount on add-ons once paid plans launch.
Install it on any device
On Windows, get LimnoLog straight from the Microsoft Store. As a PWA, install it on your phone and computer right from the browser. The native Android app (QR scanner, GPS, printing) is available on Google Play and Huawei AppGallery.
Available as an app in the store:
The whole workflow - from field to report
Works with zero signal
Before fieldwork, prepare the project and sampling stations online and download the project to your device. Record sessions and measurements offline in the field; they sync when the connection returns.
New readings without downloading files every day
Connect your project to a supported sensor or public data source. LimnoLog fetches new readings on the schedule you set, so you can compare them with your own measurements. See the connectors page for supported sources and setup details.
Connectors & public dataFrom your spreadsheet to charts and a report
Import your existing measurements, compare stations and dates on a chart, and include the selected range in a PDF report. You can still export data to Excel or statistical tools.
Shared projects and quality checks
Team roles, a station map and a sampling planner. Approve and lock sessions and review manual changes retained for up to 24 months; automatic connector readings are not logged individually. Accessibility: partial WCAG 2.1 AA compliance, with the scope described in the accessibility statement.
See it in the app
This is what analysis looks like in LimnoLog
Correlations between indicators
A correlation matrix and regression with a trend line (R²) - check relationships between indicators without exporting to a spreadsheet.
Method comparison
Deming regression and a Bland-Altman plot show whether a new method (e.g. an optical probe) agrees with the reference - bias, RMSE and limits of agreement at a glance.
Live
Live public dashboards
Share a project with a single link - no login. Data refreshes automatically.
Reef & Coast Watch
Water level and temperature from 6 NOAA tide-gauge stations (Hawaii, Florida, Caribbean, Guam), fetched automatically.
View the live dashboard
Global Rivers & Lakes Watch
Water temperature, dissolved oxygen and turbidity from 3 stations in the USA, Germany and Switzerland (USGS, Pegelonline, Eawag) - fetched automatically, with correlations between indicators.
View the live dashboardWho is it for?
Thesis, field project - a full season of measurement data in one place.
Research stations, biology & environmental faculties - team collaboration with manual change history retained for up to 24 months.
Standardised field sessions, automatic OOR flags, data export ready to use in regulatory reports.
Water treatment plants, consultancies - a simpler and more affordable alternative to full LIMS.
How does it work?
Set up your project
Choose a template or import your spreadsheet. Prepare stations and download the project online before fieldwork.
Water quality monitoringCollect measurements
In the field (offline) or in the lab. Calculated parameters update automatically on every entry.
Offline field dataAnalyse and export
Trend charts, out-of-range detection (OOR), export to Excel, PDF or CSV for STATISTICA.
Beyond spreadsheetsLearn
Guides, standards and calculators - free
Common research methods, how to read your results, and free calculators. No login required.
Methods guide
Practical guides to proven measurement methods: what, how, with what and what the result means. From limnology to neighbouring environmental fields.
- Amphibian monitoring - counts in the breeding season and at crossings
- Pheromone bark-beetle traps - monitoring and counting catches
- Small-scale forest water retention - monitoring retention structures
Knowledge base
Reference guides for people running monitoring and reading water assessments - how to understand classes, ecological and chemical status, and assessment elements.
- Ammonia in water: NH₃ or NH₄⁺ - why the form decides toxicity
- Algae and blooms in a pond - how to deal with them
- A cyanobacterial bloom - what to do and how to prevent it
Tools
They run in your browser, with no login and no data sent - a concentration-unit converter, oxygen saturation, biotic indices and more. Handy in the field and when interpreting results.
See all toolsAbout the creator
LimnoLog is an independent project developed under the WalFamSystems name by Bartłomiej Walczak. We build tools for Polish and European environmental scientists. Data is stored in the European Union, GDPR compliant.
Join the first users
Early access - everything free. Accounts created now get founder status: the core app free forever and a permanent −50% discount on add-ons.
Start for free - no credit card required