Comparison

iNaturalist Classic vs Chemical Solution Wizard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iNaturalist Classic

Record and identify species encounters with a simple interface. Contribute to scientific research and learn about biodiversity. Connect with other nature enthusiasts and explore the natural world.

Highlights
  • Identify species globally
  • Record species sightings
  • Contribute observations to science
  • Add observations to projects
  • Learn about biodiversity
  • Connect with nature enthusiasts
Features
Read full description

iNaturalist Classic is the original version of our app. For the best experience, including many new features and ongoing updates, we recommend using the new, redesigned iNaturalist app. iNaturalist Classic offers a simple interface to record encounters with biodiversity for people who are already familiar with iNaturalist. KEY FEATURES • Identify species from anywhere in the world (while online) • Keep a record of species you see • Contribute to science by sharing your observations • Add your observations manually to projects • Learn about biodiversity • Connect with and learn from other nature enthusiasts iNaturalist’s nonprofit mission is to connect people to nature and advance science and conservation. iNaturalist is freely available thanks to generous support from our community of donors. Explore and learn even more at https://www.inaturalist.org.

About

Chemical Solution Wizard

Features
Read full description

Chemical Solution Wizard has been designed to help with preparation and parameterization of complex chemical solutions and derivation of molar weight from chemical formula. Numerous parameters of the complex mixture, such as molarity, molality, mg/ml, solute moles, total volume etc. can be calculated based upon initial data provided, such as: initial molar concentrations of the starting solutions, initial volumes, desired molar ratios and additional solvent volume (dilution). This application targets two main solution preparation tasks: First, "Mixture of Solutions", makes it easy to parameterize complex mixture of several initially provided solutions. And second, "Dissolution", deals with solution formed by dissolution of solid solutes. Layout of "Mixing solutions". Each row represents initial solution, which is going to be mixed to produce a final complex solution. The initial solution parameters to start with are: solute’s molar weight (optional), solute’s molar concentration and volume of the initial solution. Last cell represents molar fraction of the particular solute in the final solution that will be calculated automatically or may be adjusted later on to get the desired components ratio. Bottom row represents final solution parameters: volume of pure solvent that optionally can be added to dilute the solution, Total Molarity and Total solution volume, that can be adjusted at any time, on condition that molar concentrations of the initial solution/s are provided. Layout of "Dissolution". Similarly, each row represents different compound (solid this time) that will be dissolved in the known final volume of the resulting solution. “Solute moles” are the output only cells that will be filled automatically. Final solution parameters row is comprised of absolutely required final solution volume cell and optional final density cell, which may come in handy for calculation of molality. Application features: Unlimited number of components is available. Additional components are added by touching “Solution (+)” field and deleted by touching the top right title field signed with (-). The components list is numbered and scrollable. The application is fully interactive: all parameters are updated instantly after any input that confirmed by pressing "Done" button in the keyboard! (if data is sufficient, otherwise warning will be shown). CSW is now includes molar weight analyser. Pressing of the arrow button in Mw field derives the molar weight of molecular formula in the name field. Examples of supported molecular formula styles: MnSO4.H2O, MnSO4*H2O, (NH4)2CrO4, (NH4)2Fe(SO4)2.6H2O, Ba(C2H3O2)2. In “Mixture”, if molecular weights (Mw, units "g/mole") of solutes are provided as well, then concentrations in units of grams of solute per litre of solution ("g/l" equivalent to "mg/ml") will be calculated. In "Dissolution", long press on Total Molarity title field will call the menu, where user can choose the options for solution parameters adjustment upon change in total molarity. Please check the molar ratios to ensure that all starting components are included! The application will expel components for which insufficient data is provided! Thus, for example concentration in mg/ml cannot be calculated if Mw of solute is not provided. Similarly, Molality cannot be calculated if final solution density is missing. If user updates molar ratios (percents only), application will not start the calculation until sum of the ratios will be 100 exactly and obviously, not before than initial concentrations (in "Mixing solutions") or Mw (in "Dissolution") are provided. Total Concentration in "mg/ml", Total Moles and Molality fields are for output only. Please confirm input by pressing "Done" or "Enter" button in the keyboard to let application know that data is ready. Application is not sensitive for an unconfirmed input for a good reason. Application assigns dot as a decimal separator.

Screenshots

iNaturalist Classic2 screens
Chemical Solution Wizard3 screens

Verdict

The call

The clearest difference is price: iNaturalist Classic at Free against Chemical Solution Wizard's $3.99. iNaturalist Classic also leads on update cadence (every 5 weeks vs every 4 months) and iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

iNaturalist Classic is free to download; Chemical Solution Wizard costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

iNaturalist Classic ships an update every 5 weeks, Chemical Solution Wizard every 4 months. The most recent releases landed on November 11, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
iNaturalist Classic versus Chemical Solution Wizard: the parameters behind the verdict, then further details
ParameteriNaturalist ClassicChemical Solution Wizard
PriceFree — better$3.99
Rating4.6 (4.7K ratings) — better—
Positive reviews81.6% of reviews—
Number of ratings4.7K — better—
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size44 MB1 MB
Age rating4+4+
DeveloperiNaturalistRoman Volinsky

Bugs and requests

iNaturalist Classic

Reported bugs

3 issues
  • Login issues or inability to create account
  • Slow upload speeds or observation syncing
  • Inconsistent performance between mobile and web versions

Requested features

5 requests
  • Ability to follow other users and see their observations
  • More filtering and sorting options for observations
  • Offline mode for taking photos and uploading later
  • Easier location input for observations
  • Private/personal project functionality

Chemical Solution Wizard

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

iNaturalist Classic

No in-app purchases

None

Chemical Solution Wizard

No in-app purchases

Questions

Is iNaturalist Classic free?
iNaturalist Classic is free to download, with no in-app purchases.
Is Chemical Solution Wizard free?
Chemical Solution Wizard costs $3.99, with no in-app purchases.
Do iNaturalist Classic or Chemical Solution Wizard have ads?
Neither iNaturalist Classic nor Chemical Solution Wizard shows ads.
Which is updated more often, iNaturalist Classic or Chemical Solution Wizard?
iNaturalist Classic ships an update every 5 weeks, and Chemical Solution Wizard every 4 months. Most recently, iNaturalist Classic was updated on November 11, 2026 and Chemical Solution Wizard on November 1, 2026.

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