Mobile Science vs Circle Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mobile Science
Record, graph, and email accelerometer measurements from your device. Analyze motion along a single axis to measure acceleration, velocity, and distance. Offers real-time graphing and calibration options for accurate data collection.
- Record accelerometer measurements
- Graph acceleration, velocity, and distance
- Email recorded data
- Adjust sample rate
- Calibrate axis values
- Real-time axis value display
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by Ray Wisman and Kyle Forinash, Indiana University SE. Acknowledgements: Tab bar icons by Joseph Wain @ glyphish.com. Core-Plot used for plotting, http://code.google.com/p/core-plot. Acceleration records, graphs and emails the iPod/iPhone/iPad accelerometer measurements. The application is useful for measuring acceleration, velocity and distance resulting from motion along a single axis. Up to 120K unfiltered measurements can be recorded from 1 to 100 samples per second and graphed while recorded. Start to start recording measurements. Stop to stop recording. Send to send the recorded measurements as an email. Samples/second rate set using the slider bar. Calibrate to toggle zeroing of X, Y and Z axis values to ignore any effects due to gravity or other global acceleration of the device. With calibration ON, the initial one second of measurements are used to determine the average measure for each axis; for zeroing, the average is subtracted from each subsequent measure. X, Y and Z buttons display the graph of the acceleration, velocity and distance measurements for that axis. X, Y and Z axis values are displayed in real time by three progress bars and graphed. Time slider scrolls through the X, Y and Z axis values measured at the time selected.
Circle Calculator
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Enter one value and instantly calculate radius, diameter, circumference and area. The live measured diagram updates with your inputs, while formula explanations help you understand the result. CIRCLE AND GEOMETRY TOOLS • Circle, arc, sector, segment, chord and annulus • Polygon, triangle, sphere and cylinder measurements • Unit, angle and precision controls WORKSHOP PROBLEM SOLVING • Bolt Circle (PCD) with X/Y drill coordinates • Offline DN/NPS pipe schedule dimensions and weights • Metal stock weight before cutting • Cone flat patterns and pipe templates SAVE AND EXPORT Keep calculation history and favourites on your device. Eligible Pro workflows create PDF, CSV and DXF outputs for professional work. OFFLINE-READY CORE Core calculations and bundled pipe charts work without an internet connection. Purchases, advertising, support links and sharing can require a connection. FREE AND PRO Existing free calculators remain available. Pro adds selected workshop exports, advanced workflows, expanded history and an ad-free experience. The App Store shows current plans, trials and local prices before purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Mobile Science at none against Circle Calculator's 7. Mobile Science also leads on ads (none vs shown) and iOS requirement (6.0 vs 13.0). Circle Calculator's advantage is update cadence (every 5 weeks vs every 79 months). On price 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. Circle Calculator sells 7 in-app purchases, starting at $1.99 per 7 days. Mobile Science asks for nothing beyond the download.
Mobile Science ships an update every 79 months, Circle Calculator every 5 weeks. Both last shipped on October 16, 2026.
| Parameter | Mobile Science | Circle Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 79 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Indiana University | AHMET DEMIR |
In-app purchases
Mobile Science
No in-app purchases
Circle Calculator
- Circle Pro Weekly7 Days trial$1.997 Days
- Circle Pro Weekly7 Days trial$3.997 Days
- Circle Pro Monthly7 Days trial$3.991 Month
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- Circle Pro Monthly7 Days trial$7.991 Month
- Circle Pro Annual14 Days trial$24.991 Year
- Circle Pro Annual14 Days trial$49.991 Year
- Circle Calculator Pro Lifetime$49.99
Questions
Is Mobile Science free?
Is Circle Calculator free?
Do Mobile Science or Circle Calculator have ads?
Which is updated more often, Mobile Science or Circle Calculator?
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