Changelog

What's new

Last updated: 16 August 2026

Everything that changed in untangle.bio, newest first. Small fixes get one line; anything that changes how you work gets a short explanation.

15 August 2026

Improved Number fields accept a decimal comma. Typing 1,5 now means 1.5.
Fixed Numeric inputs across the app could not be cleared, and lost the decimal point while you were still typing.
Fixed A feed stream with molecules in it looked identical to an empty one on the canvas.
Fixed Molecule search in the feed stream dialog only looked inside the open tab, so molecules in other families never showed up.
Fixed The wash water inlet icon on filtration units had no matching connection point.
New Techno-economic snapshots on 20 molecule pages in the resource library.
New Expert rules now flag capacity walls that buying more equipment does not remove.

Some limits are physical, not budgetary: an osmotic pressure ceiling or a packing limit does not go away when you add a second membrane skid. Routes that hit one are now called out instead of being silently scaled up.

13–14 August 2026

New Export a run as CSV or a printable report, straight from the toolbar.
New Goal seek: set a target cost per kg and let the tool find the route, or tell you what would have to be true to get there.

If no combination of the parameters you allowed reaches your target, you get the gap and the binding constraint rather than a failure message.

New Tornado charts for operating levers and assumption risk, so you can see which input actually moves the cost.
New Accounts and cloud projects. Projects are saved to your account instead of only living in the browser, and there is a dedicated account page.
Fixed Selectivity is now calculated on a mass basis, and dense-membrane rejection follows the right physics.
Fixed Products made in a bioreactor kept a generic identity instead of picking up their real properties from the molecule database.

1–4 August 2026

New The Optimize button replaces Recalculate: pick an objective (yield, purity, cost of goods, CAPEX and five more) and search the parameters of your flowsheet against it.

The search only moves parameters you would actually change in a plant. Calibration constants stay fixed, and capital is capped on non-economic objectives so you do not get a 99% yield route that costs twenty million to build.

New Bioreactor lets you choose the substrate and set the titer directly, instead of inferring both.
New The MCP server returns mermaid flowsheets, deep links into the canvas, and PNG charts, so assistants can hand you something you can open.
Improved Filtration concentration limits are physics-based, and filtration cost now follows the flow through the unit rather than a fixed size.
Improved The optimizer says when it is finished and what it changed, instead of stopping quietly.
Fixed Water solubility for several molecules was stored in mg/L and read as g/L, a factor of 1000. Seven n-alcohols added while fixing it.
Fixed Bioreactors appeared in purification-only route searches.
Fixed Five silent failures in the canvas where an action did nothing and said nothing.
Fixed Unreadable white text on the lime buttons.

27–31 July 2026

New Public pricing: $75 per month or $600 per year, both billing periods shown side by side.
Fixed Several unit-operation design rules never fired, or measured the wrong quantity when they did.

Older changes are not listed. Something broken or missing? Get in touch.