Comparison

Sentron vs Optical flow Analysis

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

Head to head
About

Sentron

Transform your mobile device into a sophisticated pH meter. Connect wirelessly to specialized probes for accurate measurements in various applications. The app guides you through calibration, data logging, and export.

Highlights
  • Wireless pH/EC measurement
  • Bluetooth probe connectivity
  • Step-by-step calibration
  • Data logging and graphing
  • GPS data mapping
  • Automatic temperature compensation
Read full description

Turn your mobile device into a full-featured pH meter by downloading this free Analytical Sensors app. Connect your device to one or more non-glass Sentron pH probes with Bluetooth Low Energy technology. Step-by-step instructions included. The app is intuitive and guides you through the complete process of setting configurations, calibrating, acquiring, storing and exporting all measurement data. Monitoring pH was never that easy! SENTRON EUROPE BV Sentron has developed a comprehensive line of wireless high-quality probes for glass-free pH measurements. Sentron’s ISFET pH sensor technology provides accurate and reliable pH measurements for various applications. All pH probes include a replaceable, interchangeable sensor part for extra durability. It is wirelessly connected via Bluetooth to our Sentron app. Interested? Purchase your pH probe of interest simply at our web shop at www.sentron.nl/shop . For your convenience we offer carry cases with a buffer set and predrill stick. This predrill stick can be used to prepare pilot holes in dry soils. The carry case offers convenient protection for your probes. pH AS A CRITICAL PARAMETER pH is a critical parameter in many areas. Examples include agriculture, horticulture, environment, laboratory applications and inline food processes for beer, wine, meat, fish, or cheese. SENTRON’S ISFET pH SENSOR PROBE * Wireless * Glass-free * Robust * Dry storage SENTRON GLASS-FREE pH PROBES Thanks to comprehensive ISFET pH sensor technology, Sentron offers glass-free wireless pH probes. The probes are used for accurate and reliable pH measurements for demanding applications. Multiple Sentron probes can be connected simultaneously. Functions include calibration (1-, 2-, 3- and 5-point calibration), sample measurement, data logging, graph plotting and data sharing. Measurement of pH and temperature starts as soon as the probe is connected to the mobile device. A notification signals when a probe needs a new calibration. The measurement can be displayed as tabulated data or a graph. ADDITIONAL FEATURES * Display of the probe’s condition, name, reading stability and battery life * Both automatic customizable and manual data logging * Automatic temperature compensation (ATC) * User-definable alarm thresholds for pH and temperature * Automatic recognition of previously connected probes and calibration data stored on probes * GPS mapping of your pH data * Advanced mode option for expert users WIRELESS The Sentron probe’s Bluetooth Low Energy technology offers many advantages in wireless measurement convenience. Each probe can be used up to 50 meters (150 feet) from the mobile device. The Sentron probe and app are ideal for professionals and private indiiduals that need accurate wireless measurements in the laboratory, industry halls, outdoors, etc. Sentron probes are compatible with devices with Bluetooth 5.0 or higher. DEMO PROBES AVAILABLE Would you like to experience our app before buying our product? That’s possible! Download the app and add the virtual demo probe in the app. Experience the convenience of the app yourself. COMING SOON: MULTIPARAMETER PROBE The current pH probe portfolio will be extended with probes for EC (Electrical Conductivity) and ORP (Oxidation Reduction Potential). Imagine: alle these parameters in one and the same probe! Follow us at www.sentron.nl for any related news.

About

Optical flow Analysis

Analyze motion between video frames and visualize object movement. This utility helps understand visual dynamics in sequences of images.

Highlights
  • Optical flow analysis
  • Visualize object movement
  • Frame-to-frame comparison
  • Motion tracking
Features
Read full description

Perform optical flow analysis and visualize the amount of object movement between consecutive frames

Screenshots

Sentron4 screens
Optical flow Analysis1 screens

Verdict

The call

The clearest difference is rating: Sentron at 3.0 against Optical flow Analysis's 1.0. Sentron also leads on ads (none vs shown) and monetization model (free vs ad-supported). Optical flow Analysis's advantage is update cadence (fortnightly vs every 5 weeks). On price, ratings volume and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sentron holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Sentron ships an update every 5 weeks, Optical flow Analysis fortnightly. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

Scorecard6 real differences · 3 level
Sentron versus Optical flow Analysis: the parameters behind the verdict, then further details
ParameterSentronOptical flow Analysis
PriceFreeFree
Rating3.0 (2 ratings) — better1.0 (1 ratings)
Number of ratings2 — better1
Update frequencyEvery 5 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.7.2
Further details — not scored
Size94 MB38 MB
Age rating4+4+
DeveloperSentron Europe B.V.Hideaki Uchikoshi

Customer experience

Sentron

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Optical flow Analysis

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Sentron

No in-app purchases

None

Optical flow Analysis

No in-app purchases

Questions

Is Sentron free?
Sentron is free to download, with no in-app purchases.
Is Optical flow Analysis free?
Optical flow Analysis is free to download, with no in-app purchases.
Which has better reviews, Sentron or Optical flow Analysis?
Sentron is rated higher. Sentron averages 3.0 out of 5 from 2 ratings, while Optical flow Analysis averages 1.0 from 1 ratings.
Do Sentron or Optical flow Analysis have ads?
Optical flow Analysis shows ads; Sentron does not.
Which is updated more often, Sentron or Optical flow Analysis?
Sentron ships an update every 5 weeks, and Optical flow Analysis fortnightly. Most recently, Sentron was updated on October 8, 2026 and Optical flow Analysis on October 4, 2026.

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