Comparison

VibraUnits vs Chemistry Toolbox

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

Head to head
About

VibraUnits

This application facilitates the conversion of mechanical vibration analysis units. It supports conversions between displacement, velocity, and acceleration, along with frequency and various amplitude scales.

Highlights
  • Velocity, acceleration, displacement conversion
  • Frequency conversion (Hz to CPM)
  • Displacement conversion (mils to microns)
  • Velocity conversion (inch/s to mm/s)
  • Acceleration conversion (G's to m/s^2)
Features
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VibraUnits converts amplitudes of the most commonly used units in mechanical vibration analysis. The vibration equations used for changing units between displacement-velocity-acceleration only apply to vibration occurring at a discrete frequency (sinusoidal waves). Features: - Conversion between velocity, acceleration and displacement - Frequency conversion between Hz and CPM - Displacement conversion between mils and microns (RMS, 0-peak & peak-peak) - Velocity conversion between inch/s and mm/s (RMS, 0-peak & peak-peak) - Acceleration conversion between G's and m/s^2 (RMS, 0-peak & peak-peak) Disclaimer: This app is intended for educational purposes, although the calculations were made with great care, it may contain errors or inaccuracies. Using the results of the calculations is the responsibility of the user.

About

Chemistry Toolbox

Features
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Features already available: • The BEST MOLECULAR MASS CALCULATOR, by symbol or group abbreviation e.g. K4Fe(CN)6.3H2O, AcOMe... • A periodic table, with element characteristics and a dynamic comparison table • Several calculation tools for solution preparation (dilution, molar mass, molar concentration and density), and converter • Solubility table • pH color indicators • NMR (proton, carbon, constants and multiplets) • Data on common solvents (polarity, elution strength, boiling point, density...) • pKa • Buffer solutions • Organic functions (amino acids, monosaccharides, aromatic compounds, alkanes) • Standard oxidation-reduction potentials • ...

Screenshots

VibraUnits4 screens
Chemistry Toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: VibraUnits at none against Chemistry Toolbox's 2. VibraUnits also leads on iOS requirement (7.0 vs 17.6). Chemistry Toolbox's advantage is update cadence (daily vs every 10 months). On price, ads 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

Both are free to download. Chemistry Toolbox sells 2 one-off in-app purchases. VibraUnits asks for nothing beyond the download.

UpkeepUpdate frequency

VibraUnits ships an update every 10 months, Chemistry Toolbox daily. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
VibraUnits versus Chemistry Toolbox: the parameters behind the verdict, then further details
ParameterVibraUnitsChemistry Toolbox
PriceFreeFree
Rating4.6 (9 ratings) — better—
Positive reviews87.5% of reviews—
Number of ratings9 — better—
Update frequencyEvery 10 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS7.0 — better17.6
Further details — not scored
Size8 MB12 MB
Age rating+44+
DeveloperMotionics LLCFlorent Breton

In-app purchases

None

VibraUnits

No in-app purchases

2 purchases

Chemistry Toolbox

One-time2
  • One month subscription$0.99
  • Full app$4.99

Questions

Is VibraUnits free?
VibraUnits is free to download, with no in-app purchases.
Is Chemistry Toolbox free?
Chemistry Toolbox is free to download, with in-app purchases available.
Do VibraUnits or Chemistry Toolbox have ads?
Neither VibraUnits nor Chemistry Toolbox shows ads.
Which is updated more often, VibraUnits or Chemistry Toolbox?
VibraUnits ships an update every 10 months, and Chemistry Toolbox daily. Most recently, VibraUnits was updated on October 29, 2026 and Chemistry Toolbox on October 28, 2026.

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