Comparison

MultiSens vs Bolt Torque Spec Calc

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

Head to head
About

MultiSens

Connect to wireless BLE vibration sensors to perform detailed vibration analysis. Analyze time waveforms, spectrum plots, and vibration levels. Store data locally or in the cloud for further review and asset management.

Highlights
  • BLE vibration sensor connection
  • Time Waveform analysis
  • Spectrum Plot analysis
  • Vibration Meter (Acceleration, Velocity, Displacement)
  • Machine Acceptance Testing
  • Machine Motion Testing
  • Cloud data storage
Features
Read full description

The app is designed to connect to a variety of wireless BLE vibration sensor and to perform different types of vibration analysis, including: - Time Waveform (Including cursors for higher peaks and difference calculation) - Spectrum Plot (Including Cursors for high peaks, cpm and sidebands) - Vibration Meter (Overall and Filtered) in Acceleration, Velocity and Displacement - Machine Acceptance Testing - Machine Motion Testing Data and Reports can be stored on the device or in the cloud for further analysis. Take out-of-route measurements (offline & online) and assign it to any point in your asset tree. The asset tree can have as many levels as you require. Note: Cloud functionality and other features will require an account with SensOS.

About

Bolt Torque Spec Calc

Calculates bolt torque specifications for various SAE and metric sizes and grades. Provides results in both ft-lb and N·m, accounting for dry or lubricated conditions. Works offline without ads or subscriptions.

Highlights
  • SAE and Metric bolt specifications
  • 28 SAE and 17 Metric sizes
  • Dry vs. Lubricated multiplier
  • Torque in ft-lb and N·m
  • Offline functionality
  • Formula and K factor shown
Features
Read full description

Built for mechanics, millwrights, and equipment installers who need bolt torque on the bench - not a desktop tool. WHAT IT DOES Looks up torque values for standard bolt sizes and grades using the T = K x D x F formula with K = 0.20. SAE grades 2, 5, and 8 across 28 sizes from #6-32 to 1-1/2 inch. Metric classes 4.6, 8.8, 10.9, and 12.9 across 17 sizes from M3 to M36. Dry vs. lubricated multiplier applied to the result. INPUTS - Standard: SAE or Metric - Bolt size (28 SAE or 17 metric sizes available) - Bolt grade or class - Lube condition: Dry or Lubricated RETURNS - Torque in ft-lb - Torque in N·m CALCULATION BASIS - Torque formula: T = 0.20 x D x F - Preload F = 75% of proof strength times tensile stress area - Lubricated multiplier: 0.75 times the dry value WHY THIS APP, NOT THE FREE ONES - Math is shown - formula and assumed K factor visible, not hidden. - 45 size and grade combinations covered in one tap. - Works offline - shop floor, field repair, no Wi-Fi. Always available. - No login. No ads. No telemetry. No subscription. PRICING $1.99. Pay once, own it. Lifetime access on iPhone, iPad, and Mac via Family Sharing. NOT A SUBSTITUTE FOR Manufacturer-specified torque values for safety-critical fasteners. Calibrated wrench certificates. Specific K-factor adjustments for anti-seize, plating, or galvanized threads - this app uses K = 0.20 for both dry and lubricated, with the 0.75x multiplier as the only lube adjustment. Verify against the OEM tightening spec for the specific application.

Screenshots

MultiSens4 screens
Bolt Torque Spec Calc3 screens

Verdict

The call

The clearest difference is price: MultiSens at Free against Bolt Torque Spec Calc's $4.99. MultiSens also leads on rating (5.0 vs 3.0) and iOS requirement (11.0 vs 17.0). On ratings volume, update cadence, ads 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

MultiSens is free to download; Bolt Torque Spec Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MultiSens holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

MultiSens ships an update monthly, Bolt Torque Spec Calc every 3 weeks. The most recent releases landed on October 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
MultiSens versus Bolt Torque Spec Calc: the parameters behind the verdict, then further details
ParameterMultiSensBolt Torque Spec Calc
PriceFree — better$4.99
Rating5.0 (1 ratings) — better3.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings11
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size20 MB1 MB
Age rating4+4+
DeveloperSens-OSShanghai Sheyuan Network Technology Co., Ltd.

Customer experience

MultiSens

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

Bolt Torque Spec Calc

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

MultiSens

No in-app purchases

None

Bolt Torque Spec Calc

No in-app purchases

Questions

Is MultiSens free?
MultiSens is free to download, with no in-app purchases.
Is Bolt Torque Spec Calc free?
Bolt Torque Spec Calc costs $4.99, with no in-app purchases.
Which has better reviews, MultiSens or Bolt Torque Spec Calc?
MultiSens is rated higher. MultiSens averages 5.0 out of 5 from 1 ratings, while Bolt Torque Spec Calc averages 3.0 from 1 ratings.
Do MultiSens or Bolt Torque Spec Calc have ads?
Neither MultiSens nor Bolt Torque Spec Calc shows ads.
Which is updated more often, MultiSens or Bolt Torque Spec Calc?
MultiSens ships an update monthly, and Bolt Torque Spec Calc every 3 weeks. Most recently, MultiSens was updated on October 3, 2026 and Bolt Torque Spec Calc on October 31, 2026.

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