VibraUnits vs Chemistry Toolbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
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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.
Chemistry Toolbox
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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
Verdict
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
Both are free to download. Chemistry Toolbox sells 2 one-off in-app purchases. VibraUnits asks for nothing beyond the download.
VibraUnits ships an update every 10 months, Chemistry Toolbox daily. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | VibraUnits | Chemistry Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (9 ratings) — better | — |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 10 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 7.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 12 MB |
| Age rating | +4 | 4+ |
| Developer | Motionics LLC | Florent Breton |
In-app purchases
VibraUnits
No in-app purchases
Chemistry Toolbox
- One month subscription$0.99
- Full app$4.99
Questions
Is VibraUnits free?
Is Chemistry Toolbox free?
Do VibraUnits or Chemistry Toolbox have ads?
Which is updated more often, VibraUnits or Chemistry Toolbox?
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