Comparison

Universal Security Instruments vs Primo Scale

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

Head to head
About

Universal Security Instruments

Manage and control your smart security and environmental devices remotely. This app offers a central hub for all your connected products, allowing for easy setup, monitoring, and sharing of device access with others.

Highlights
  • Remote device management
  • Monitor devices globally
  • Share device access
  • Simple and secure setup
  • Centralized hub for USI products
Features
Read full description

Universal Security Instruments Control and manage your USI Smart devices from anywhere with this helpful app. Whether you are securing your home or managing your environment, our app provides a central hub for all your USI security and smart products. • Remote Management: Control and monitor your devices from anywhere in the world. • Seamless Sharing: Easily share device access among family members and friends to keep everyone connected and secure. • Simple & Secure Setup: Quickly and securely connect your new devices to your home network to get started in minutes.

About

Primo Scale

This app transforms your phone into a versatile measurement tool. It uses AI and your camera to weigh objects, measure dimensions, count items, and scan food for nutritional information, eliminating the need for physical tools.

Highlights
  • Digital gram scale for weighing objects
  • AI tape measure and ruler for dimensions
  • Object counter for pills, coins, and more
  • Food scanner for calorie and macro tracking
  • LiDAR support for enhanced accuracy on iPhones
  • Offline functionality for most scan types
Features
Read full description

Primo Scale is an AI object identifier and visual weight estimator. Point your camera at any object. The AI identifies what it is, then estimates a likely weight range from visual analysis and reference data. Your phone has no weight sensor, so Primo Scale never physically weighs anything. It recognizes the object, then estimates a likely weight range from its size and from reference data. Every number is an informed estimate. When an exact figure matters, reach for a calibrated scale. HOW IT WORKS 1. Primo Scale identifies the object in your photo. 2. It draws on reference data for that kind of object, including the USDA FoodData Central database for food. 3. It estimates a likely range for your specific item from visual size cues. Every result shows a range, not a single certain number. FOUR MODES, ONE APP IDENTIFY & ESTIMATE: AI Gram Scale Estimator Get an estimated weight range in grams, ounces, or pounds. A gram scale estimator for baking ingredients, jewelry, coffee, spices, and small packages. Works as an AI digital scale estimator and a kitchen scale estimator for the moments when you do not have a scale at hand. On iPhone Pro models, LiDAR sensor data helps refine the size estimate. An AI scale that approximates rather than weighs. TAPE MEASURE: AI Ruler and Dimension Estimator Estimate the width, height, and depth of an object from a photo. Switch between metric and imperial units. Works as a ruler app and a tape measure estimator for quick dimension checks. Approximate only. OBJECT COUNTER: Pill, Coin and Object Counter Count coins, pills, nuts, bolts, or similar items in a single photo. A fast pill counter, coin counter, and object counter by camera. Ideal for inventory, pharmacy stock, crafts, and DIY projects. Counting is based on image recognition and can miscount. CALORIE ESTIMATOR: AI Food Scanner Identify meals and get approximate calories plus macros (protein, fat, carbs, fiber), backed by the USDA nutrition database. Works as a food scanner and a food scale estimator for diet awareness. Calorie figures are estimates, not medical or nutritional advice. WHO IT IS FOR Home cooks and bakers estimating ingredients when a kitchen scale is not at hand Jewelry sellers and hobbyists who want a quick gram estimate Home shippers approximating package weight and size Diet and fitness users tracking calories from photos Makers, crafters, and resin artists working with small parts Small businesses counting stock and checking dimensions Students and DIYers who need a quick field estimate WHY PRIMO SCALE An AI object identifier first, a weight scale estimator second. We tell you what the object is, then what that kind of object typically weighs. Every estimate is a range, never a single certain figure. Powered by Google Gemini, enhanced by LiDAR on iPhone Pro models. No calibration card or physical reference object needed. Metric and imperial units supported. Local history, private by default. A NOTE ON ACCURACY Primo Scale is an estimation tool, not a measuring instrument. It is not a physical scale, it has no load cell, and it does not use phone sensors to weigh. Think of it as a digital scale style estimation tool: handy when no scale is around, and honest about being approximate. For anything critical, medical, professional, or commercial, use a certified physical scale. Download Primo Scale to identify objects and estimate their weight, size, count, and calories from a single photo. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Universal Security Instruments4 screens
Primo Scale4 screens

Verdict

The call

The clearest difference is in-app purchases: Universal Security Instruments at none against Primo Scale's 4. Universal Security Instruments also leads on rating (5.0 vs 4.8). Primo Scale's advantage is update cadence (every 2 weeks vs every 2 months) and ratings volume (5 vs 1). On price, ads, monetization model 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. Primo Scale sells 4 in-app purchases, starting at $3.99 per 7 days. Universal Security Instruments asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Universal Security Instruments holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Primo Scale has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Universal Security Instruments ships an update every 2 months, Primo Scale every 2 weeks. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

Scorecard4 real differences · 5 level
Universal Security Instruments versus Primo Scale: the parameters behind the verdict, then further details
ParameterUniversal Security InstrumentsPrimo Scale
PriceFreeFree
Rating5.0 (1 ratings) — better4.8 (5 ratings)
Number of ratings15 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size200 MB25 MB
Age rating12+4+
DeveloperFeit ElectricPrimo Technology Ltd.

In-app purchases

None

Universal Security Instruments

No in-app purchases

4 purchases

Primo Scale

Subscriptions4
  • Premium Weekly Limited Subscription3 Days trial$3.997 Days
  • Premium Weekly Subscription3 Days trial$5.997 Days
  • Premium Yearly Limited Subscription$19.991 Year
Show 1 more
  • Premium Yearly Subscription3 Days trial$29.991 Year

Questions

Is Universal Security Instruments free?
Universal Security Instruments is free to download, with no in-app purchases.
Is Primo Scale free?
Primo Scale is free to download, with in-app purchases available.
Which has better reviews, Universal Security Instruments or Primo Scale?
Universal Security Instruments is rated higher. Universal Security Instruments averages 5.0 out of 5 from 1 ratings, while Primo Scale averages 4.8 from 5 ratings.
Do Universal Security Instruments or Primo Scale have ads?
Neither Universal Security Instruments nor Primo Scale shows ads.
Which is updated more often, Universal Security Instruments or Primo Scale?
Universal Security Instruments ships an update every 2 months, and Primo Scale every 2 weeks. Most recently, Universal Security Instruments was updated on September 30, 2026 and Primo Scale on October 6, 2026.

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