ResearchCalc

Dilution, molarity & stats

Only for iPhone

Free · In‑App Purchases

iPhone

ResearchCalc is a calculator for life-science researchers, built for the calculations that come up every day in the lab: dilutions, molar concentrations, statistics, and more. Save key results on the same screen and reuse them in your next prep with one tap. Work through media prep, dilution series, and statistics without flipping between notes and other apps. Works fully offline. [Built-in conversions (13 free)] · Dilution (C₁V₁ = C₂V₂) · Stock prep (M × V × MW) · Stock prep (mass conc., m = C × V) · %w/v solution prep · %v/v solution prep · X-fold stock dilution · Molar mass (g ↔ mol) · Specific gravity (g ↔ mL) · A260 → nucleic acid concentration · A280 → protein concentration · OD600 → cell density (microbes) · Antibody / stain dilution (1:N) · Serial dilution [Scientific keys + statistics] Tap fx (top right) to switch to scientific mode. Trig, log, exp, and exponents — plus quick statistics (mean / SD / SEM / CV%) computed in one tap from a list of numbers. [Memos — keep results on screen] Pin important results at the top of the calculator screen. For multi-step prep (e.g. stock → dilution → reaction mix), recall earlier values without changing screens. Tap the × button on a memo chip to remove it. [39 compound presets] Built-in molecular weights and densities for common reagents (NaCl, Tris, DMSO, glycine, glucose, and more). Pull them up from any conversion. [History] Every calculation is auto-saved. Search through history and pin anything worth keeping as a memo. [Privacy] App-generated data (history, memos, presets, settings) is stored on the device only and is not sent to external servers. No account required. The free tier uses Google AdMob, which may collect or process device data per Google's policies for ad delivery. Ads are removed entirely with the Pro upgrade. [Pro (one-time purchase, no subscription, for research and educational use)] · 7 additional conversions: reagent batch prep, cell seeding, cell density (hemocytometer), concentrated acid/base dilution (purity + density), % additive (stock-volume basis and final-volume basis), and animal-research unit conversion (mg/kg + concentration → preparation volume, non-clinical research only) · Add and edit compound presets · Keep history with no time limit (up to 200 entries) + CSV export · Up to 15 memos (free tier: 3) · Customize keypad layout · No ads [Who it's for] · Life-science researchers (biology, biochemistry, pharmacology, biomedical research, including industry R&D) · Undergraduates, graduate students, and postdocs [Disclaimer] ResearchCalc is a calculation aid for research and educational use only. It is not intended for determining patient dosing, clinical diagnosis, treatment decisions, or use as a medical device. Always verify calculation results before use. The developer assumes no responsibility for any damages arising from the use of this app.

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Bug fixes and stability improvements: • Fixed a rare issue where calculation history could fail to save • Fixed the serial dilution step preview to show correct values • Fixed molecular weight / density input on locales that use a comma as the decimal separator • Minor display refinements

Version 1.0.2

The developer, Akira Sugiyama, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Akira Sugiyama
Size
49 MB
Category
Utilities
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
Languages
English and Japanese
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Akira Sugiyama
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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