Assay — Support
Contact us
Need help, found a bug, disagree with a number, or want a calculator added? Email caglarbozkurt@outlook.com and we'll get back to you, usually within a few days. It helps to include your device model, iOS version, and — if it's about a result — a non-confidential example of the inputs you used so we can reproduce it. Do not send proprietary sequences or sensitive experiment details.
What is Assay?
Assay is a bench calculator for scientists. It covers the everyday math of the lab — protein and oligo properties, molarity, dilutions, ng/µL ↔ nM, buffer pH, ligation ratios, agarose gels, RCF ↔ RPM and more. It provides methods, assumptions and input checks so you can assess the result against your protocol.
How accurate are the numbers? Where do they come from?
Each tool explains its calculation method. Protein MW and extinction use standard residue and absorbance models; pI is a theoretical estimate. Oligo Tm uses the complete SantaLucia (1998) nearest-neighbor parameters with monovalent salt, without Mg²⁺/dNTP corrections. No model substitutes for your protocol or instrument limits. See Methods and validation for assumptions, references and how the calculations are checked. If a number disagrees with your reference, send a non-confidential reproducible example.
What's free, and what's in Pro?
The core calculators are free, including protein properties, molarity, dilution, oligo tools and RCF ↔ RPM. Free saves one construct and one rotor. Assay Pro is a one-time in-app purchase, with your local price displayed before purchase. It adds tagged-construct configuration, A₂₈₀ concentration, serial dilution, single-powder preparation with purity correction, PCR/qPCR scaling and named saved mix recipes. Pro saves unlimited constructs, rotors and mixes. The browser is a free preview; Pro is purchased in the iOS app.
I bought Pro but it's locked on my other device (or after reinstalling)
Assay Pro is a one-time purchase tied to your Apple ID. Open Settings in the app and choose Restore Purchases — as long as you're signed in with the same Apple ID you bought it with, this re-unlocks Pro at no charge. If it still doesn't restore, email us.
Is my data private? Does it work offline?
Scientific calculations run locally, and the installed app works offline. Public UniProt lookups, optional opt-in usage analytics and App Store ownership checks, purchases and restoration use the internet. Pasted sequences, saved names and calculation values are not included in analytics. The website itself requires a connection to load. See the Privacy Policy.
Can I enter a sequence by UniProt ID?
Yes — in the protein tool, switch the input to UniProt and enter an accession
(e.g. P0DTC2) to load a public sequence. You can also paste a raw sequence or FASTA;
one FASTA record is supported. Unknown residues, unsupported notation and multiple records are rejected instead of silently concatenated.
Will my work stay when I switch tools?
Yes. Drafts remain available while you move between tools in the current session. Save a construct, rotor or named Pro mix recipe to keep it for a later session. Unsaved draft inputs are not a permanent history.
Do I need an account?
No. There's no account, no login, and no sign-up. Assay just works.
How do I delete my saved data?
Open Settings and delete any saved construct, rotor or mix recipe individually (you'll be asked to confirm). Removing the app or clearing browser storage removes local data, subject to any backups you manage. Restoring a Pro purchase does not restore or sync your scientific library.
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