LGSForce vs SpringCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LGSForce
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LGSForce is an intelligent business assistance app. Through this app, partners of Leica Geosystems can record and upload various business activities. Through the query and analysis of various activities, it is convenient to control business activities more accurately and promote the implementation of various business activities.
SpringCalc
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SpringCalc is a professional engineering calculator for mechanical springs. Enter any subset of spring parameters and SpringCalc solves for the rest — wire diameter, mean diameter, coil count, free length, spring rate, force, stress, safety factor and predicted fatigue life. Features: • Three spring types: Compression, Extension, Torsion • 15 built-in materials (Music Wire, Hard Drawn, Oil Tempered, Chrome Silicon, Chrome Vanadium, 302/304/316/17-7 PH Stainless, Phosphor Bronze, Beryllium Copper, Monel 400, Inconel 600/X-750/718) with JIS aliases (SWP-A/B, SUS302/304/316-WPB, SWOSC-V, etc.) • ASTM/SAE and JIS B 2704 calculation standards • Constraint-based solver with Wahl factor stress correction • Goodman + Basquin fatigue life prediction with environmental and temperature derating • Force-deflection and S-N curves via Swift Charts • 3-candidate design suggestion when system is under-determined • Standard wire gauge snap (ISO 2702 / SWG) • Custom material editor • Metric, Imperial and Mixed (mm/kgf) units • PDF and text report export • Save designs locally with SwiftData • Localized in English, Traditional Chinese and Japanese References: Shigley's Mechanical Engineering Design 10e Ch.10, JIS B 2704:2009, JIS B 2705:2014, SMI Handbook of Spring Design. All calculations run entirely on-device — no account, no cloud, no tracking.
Screenshots
Verdict
The clearest difference is ads: LGSForce at none against SpringCalc's shown. LGSForce also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). SpringCalc's advantage is update cadence (every 2 weeks vs every 2 months). On price 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
LGSForce ships an update every 2 months, SpringCalc every 2 weeks. The most recent releases landed on October 12, 2026 and October 28, 2026 respectively.
| Parameter | LGSForce | SpringCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 徕卡测量系统(上海)有限公司 | Sui Fai Law |
In-app purchases
LGSForce
No in-app purchases
SpringCalc
No in-app purchases









