Comparison

BoltSpec Pro vs Process Engineer Calc

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

Head to head
About

BoltSpec Pro

Features
Read full description

Comprehensive tool for mechanical engineers and technicians dealing with bolts, fasteners, and joint design. BoltSpec Pro provides instant access to a vast database of standard bolt specifications, torque calculations, and material properties. Key Features: - Extensive Database: Access ISO, SAE, and ASTM standards for metric and imperial fasteners. - Precision Torque Calculator: Calculate required tightening torque based on bolt grade, size, and lubrication conditions. - Material Properties: Detailed data on steel grades, tensile strengths, and yield points. - Unit Conversion: Seamlessly switch between Metric and Imperial units. - Favorites: Save frequently used fastener specs for quick access. Perfect for automotive, aerospace, construction, and manufacturing professionals.

About

Process Engineer Calc

Features
Read full description

ProcessCalc is an ad-free, offline-ready utility app designed specifically for chemical engineers, extraction technicians, and laboratory researchers. Whether you are scaling up a synthesis from bench to pilot scale, optimizing solvent recovery, or sizing a chiller for your jacketed reactor, this app provides 10 specialized engineering calculators to streamline your daily workflow. Key Calculators Included: • Solvent Recovery: Estimate evaporation rates and recovery times. • Chiller Sizing: Calculate required cooling capacity (kW) and tonnage. • Biomass Capacity & Yield: Optimize loading and predict expected yields. • Scale-up Predictor: Lab to production volume and flow rate scaling. • Condenser Area: Determine required heat transfer area. • Vapor Velocity: Avoid flooding in vacuum systems with min-ID calculations. • Pump Flow Rate: Quick displacement to LPM/LPH conversions. • Scaling Risk Predictor: Assess system scaling and maintenance needs. • Vacuum Diagnostic: Calculate rate-of-rise and system leak rates. • Compliance Map: Quick reference for global hemp/CBD regulations. App Features: Zero Ads: No pop-ups, no tracking, no subscriptions. Offline First: Works instantly in the lab or extraction facility where internet might be spotty. Favorites: Star your most-used tools for one-tap access. Practical: Built around real-world formulas used in extraction and chemical processing facilities. Designed by engineers, for engineers.

Screenshots

BoltSpec Pro3 screens
Process Engineer Calc4 screens

Verdict

The call

The clearest difference is price: Process Engineer Calc at Free against BoltSpec Pro's $1.99. On ads, in-app purchases, device support and iOS requirement 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

Process Engineer Calc is free to download; BoltSpec Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 5 level
BoltSpec Pro versus Process Engineer Calc: the parameters behind the verdict, then further details
ParameterBoltSpec ProProcess Engineer Calc
Price$1.99Free — better
Update frequency—Every 10 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size2 MB11 MB
Age rating4+4+
DeveloperQixin Net (Beijing) Technology Co., Ltd.冯泰 蔡

In-app purchases

None

BoltSpec Pro

No in-app purchases

None

Process Engineer Calc

No in-app purchases

Questions

Is BoltSpec Pro free?
BoltSpec Pro costs $1.99, with no in-app purchases.
Is Process Engineer Calc free?
Process Engineer Calc is free to download, with no in-app purchases.
Do BoltSpec Pro or Process Engineer Calc have ads?
Neither BoltSpec Pro nor Process Engineer Calc shows ads.

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