Comparison

Gear Design Master vs iLight Flashlight & Glow

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

Head to head
About

Gear Design Master

Features
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Gear Master is an engineering workspace for mechanical designers, manufacturing engineers, inspectors, and maintenance teams. It connects design targets, geometry checks, candidate comparison, manufacturing preparation, and deliverables in one traceable workflow. GEAR PAIR DESIGN CHECK • External parallel-axis spur and helical gear pairs • Normal module, tooth counts, pressure and helix angles, face width, profile shifts, and backlash • Working pressure angle, center distance, pitch geometry, tooth thickness, base pitch, and contact ratios • Screening for theoretical undercut, tip thickness, continuous mesh, and geometry limits • Preliminary Lewis/Hertz strength screening from power, speed, application factor, accuracy grade, and materials RATIO & CENTER-DISTANCE SOLVER • Search by target ratio, center distance, envelope, module, tooth counts, and minimum contact ratio • Evaluate spur and several helical-angle strategies • Produce up to 40 deterministically ranked candidates • Explain scores, preferred modules, and rejection counts MANUFACTURING & INSPECTION • Base-tangent span tooth count and length • Normal chordal thickness and height, ideal pin, and selected-pin measurements over pins • Active-involute pin-contact validation, helical measurement-width limit, and lead • Preview complete closed nominal transverse involute profiles • Export millimetre-based ASCII R12 DXF, CSV data, and Markdown reports MATERIALS & PROJECTS • Grade-specific through-hardened, induction-hardened, case-hardened and nitrided steels, grey and ductile irons, and copper alloys • ISO 6336-5 Method B MQ reference stress data for listed steel and cast-iron hardnesses • Save complete inputs and the selected inverse-design candidate for later continuation • Core calculations run on device; engineering inputs are not uploaded Strength results are intended for design screening. Final release should add the applicable load spectrum, life, reliability, lubrication, flank modification, and manufacturing-tolerance evaluation. DXF files contain nominal profiles; verify the cutter-generated root, modifications, and tolerance band before CAM. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

iLight Flashlight & Glow

Features
Read full description

iLight is a clean, reliable flashlight app for everyday light: getting up at night, handling a power outage, camping, finding something nearby, taking a quick selfie, or using your screen as a soft light. Use the camera flash as an adjustable flashlight, or turn the whole screen into a screen light with brightness and color controls. The interface stays calm and focused, with the controls you need close at hand. Features: Adjustable flashlight brightness Screen Light mode with colors and brightness control Steady, SOS, Strobe, and Beacon modes Compass panel for quick direction checks Live Activity and Dynamic Island status Keep Screen Awake and haptic feedback settings No ads, no tracking, local settings iLight does not capture, store, or upload photos or videos. Compass features may request location permission to improve heading accuracy; location data is not stored or shared by iLight. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://superlifeos.github.io/ilight/privacy/

Screenshots

Gear Design Master3 screens
iLight Flashlight & Glow4 screens

Verdict

The call

Gear Design Master and iLight Flashlight & Glow are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Gear Design Master sells 1 one-off in-app purchase and iLight Flashlight & Glow sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Gear Design Master versus iLight Flashlight & Glow: the parameters behind the verdict, then further details
ParameterGear Design MasteriLight Flashlight & Glow
PriceFreeFree
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size4 MB3 MB
Age rating4+4+
Developer磊 高宗悦 姚

In-app purchases

1 purchases

Gear Design Master

One-time1
  • Gear Master Lifetime$4.99
3 purchases

iLight Flashlight & Glow

One-time3
  • Small Tip$1.99
  • Warm Tip$3.99
  • Generous Tip$9.99

Questions

Is Gear Design Master free?
Gear Design Master is free to download, with in-app purchases available.
Is iLight Flashlight & Glow free?
iLight Flashlight & Glow is free to download, with in-app purchases available.
Do Gear Design Master or iLight Flashlight & Glow have ads?
Neither Gear Design Master nor iLight Flashlight & Glow shows ads.

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