Comparison

Vibration Meter, seismograph vs ContractShield

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

Head to head
About

Vibration Meter, seismograph

This application uses your phone's accelerometer to measure and record vibrations from various sources, including earthquakes and everyday objects. It displays ground motion on a graph and uses an instrumental intensity scale for analysis. You can also monitor and share your measurement results.

Highlights
  • Measures vibration strength
  • Detects seismic waves
  • Uses accelerometer for analysis
  • Displays ground motion graph
  • Utilizes instrumental intensity scale
  • Monitors and shares results
Features
Read full description

Vibration meter is an app called seismograph or seismometer, which measures the strength of vibration, quakes, earthquakes, vibrations of the human body or any other objects around you. Our app allows for detecting and recording of seismic waves generated by earthquakes, volcanic eruptions, avalanches and other sources of vibration and shocks. Accelerometer in your mobile phone is used for detection of vibrations and measurement analysis. Graph presents a record of the ground motion at a measuring point. Ground movement or an object is presented as a function of time in the three Cartesian axes, with the z axis perpendicular to the Earth's surface and the x- and y- axes parallel to the surface. Mercalli intensity scale is a seismic scale used for measuring the intensity of an earthquake. It measures the effects of an earthquake and it is distinct from the moment of magnitude. Richter Scale assigns a magnitude number to quantify the energy released by an earthquake. Peak Ground Acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an accelerogram at a site during a particular earthquake. In this app we use Instrumental Intensity Scale (developed by The United States Geological Survey) which maps peak ground acceleration and peak ground velocity on an intensity scale similar to the felt Mercalli Scale. These values are used to create shake maps by seismologists on around the world. Mercalli Intensity Scale distinguishes the following levels of vibration and impact damage: I. Instrumental - Not felt. Recorded by seismographs. II. Weak - Felt only on top floors of high buildings. III. Slight - Felt indoors, like a passing light truck. IV. Moderate - Windows, doors rattle. Like passing train. V. Rather Strong - Felt by all. Small objects upset. VI. Strong - Books off shelves. Trees shake. Damage. VII. Very Strong - Difficult to stand. Buildings damaged. VIII. Destructive - Significant damage. Trees broken. IX. Violent - General panic. Serious damage. Cracks. X. Intense - Most buildings destroyed. Rails bent. XI. Extreme - Rails bent greatly. Pipelines destroyed. XII. Catastrophic - Near total damage. This app allows you monitor and share the results of your measurements with other users. Measure and monitor all vibration and shocks using smartphone or tablet!

About

ContractShield

Features
Read full description

Don't sign another contract without checking it first. ContractShield is your AI-powered contract scanner that detects red flags, hidden risks, and unfair terms in seconds. Whether you're reviewing a lease, freelance agreement, employment offer, or business deal, ContractShield helps you understand what you're really agreeing to before you sign. HOW IT WORKS 1. Scan or Upload - Use your camera to scan a paper document or import a PDF from your photo library 2. Instant Analysis - Our rule-based engine scans every clause for 20+ types of red flags including hidden fees, auto-renewal traps, vague liability terms, and one-sided obligations 3. Risk Score - Get a clear risk rating from Low to Critical so you know at a glance whether a contract is safe to sign 4. Detailed Breakdown - Each red flag is explained in plain English with the exact clause highlighted, so you know what's wrong and where to find it WHAT CONTRACTSHIELD DETECTS - Auto-renewal and evergreen clauses - Hidden fees and penalty escalations - One-sided termination rights - Vague or ambiguous language - Unlimited liability exposure - Unfair indemnification requirements - Overly broad non-compete restrictions - Missing essential contract provisions - Inconsistent terms and contradictions - Unreasonable payment terms AI-POWERED ANALYSIS (PRO) Upgrade to Pro and unlock advanced AI analysis powered by cutting-edge language models. Get deeper insights, contextual explanations, negotiation suggestions, and plain-English summaries of complex legal language. BUILT FOR REAL LIFE - Renting an apartment? Scan the lease before you sign - Starting a new job? Review your employment agreement - Hiring a freelancer? Check the service contract - Buying a car? Understand the sale agreement - Running a business? Analyze NDAs and vendor contracts YOUR DATA STAYS PRIVATE ContractShield processes documents on-device whenever possible. Your contracts are never stored on our servers. Local analysis runs entirely on your iPhone or iPad using Apple's built-in text recognition technology. KEY FEATURES - Camera scanning with real-time OCR - PDF import from photo library - Instant red flag detection - Color-coded risk levels (Critical, Warning, Standard) - Detailed flag explanations in plain English - Full scan history with search - Pro tier with AI-powered deep analysis - Dark mode support - Designed for iPhone and iPad ContractShield does not provide legal advice and is not a substitute for an attorney. Always consult a qualified lawyer for legally binding decisions.

Screenshots

Vibration Meter, seismograph4 screens
ContractShield4 screens

Verdict

The call

The clearest difference is iOS requirement: Vibration Meter, seismograph at 12.0 against ContractShield's 17.0. On price, 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

Both are free to download. Vibration Meter, seismograph sells 1 one-off in-app purchase and ContractShield sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Vibration Meter, seismograph versus ContractShield: the parameters behind the verdict, then further details
ParameterVibration Meter, seismographContractShield
PriceFreeFree
Rating4.7 (732 ratings) — better—
Positive reviews42.5% of reviews—
Number of ratings732 — better—
Update frequencyEvery 7 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size18 MB3 MB
Age rating4+9+
DeveloperExaMobile S.A.贺 周

In-app purchases

1 purchases

Vibration Meter, seismograph

One-time1
  • Remove ads$1.99
2 purchases

ContractShield

Subscriptions2
  • ContractShield Pro Monthly$7.991 Month
  • ContractShield Pro Yearly$49.991 Year

Questions

Is Vibration Meter, seismograph free?
Vibration Meter, seismograph is free to download, with in-app purchases available.
Is ContractShield free?
ContractShield is free to download, with in-app purchases available.
Do Vibration Meter, seismograph or ContractShield have ads?
Neither Vibration Meter, seismograph nor ContractShield shows ads.

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