Comparison

Gauge vs Spool Master

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

Head to head
About

Gauge

Features
Read full description

Gauge connects to your TPMS Bluetooth beacons to display live tire pressure and temperature readings on your iPhone. Perfect for motorcycles, electric bicycles and multi-vehicle tracking. Use your aftermarket Bluetooth TPMS (Tire Pressure Monitoring System) to monitor tire pressures in realtime: - The app collects pressure, temperature, timestamps and battery level - You can set limits to indicate low or high pressure - We have a widget so you can easily see the last pressure reading - You can also calibrate the pressure sensors to better match your tire inflator Monitor how these change over time and with use: - View this in graphs and summary statistics - Monitor changes for all your registered vehicles - Select subsets of data - Export your data to your spreadsheet of choice for more information. Have complete control over your data: - You don't need an account - We don't collect your data - Your data can be exported by you - both ride and TPMS data Go on rides and collect other data: - We have added location (with permission) - You can also collect weather and altitude information - We also offer G-force to measure your cornering - We also collect average and maximum speed as well as trip time - We have added Push-To-Talk - so you can chat with another user on the ride using your Airpods and a bluetooth mic Customise your experience: - Choose between metric and imperial measures of pressure and temperature - We have dark mode in the app - You can also choose an accent colour for the app - We have deep links. This allows you to connect Gauge to the Shortcuts app or NFC stickers to trigger a ride. Please leave a review in the Appstore and suggest features you want to see.

About

Spool Master

Manage your 3D printing filament stock with NFC tag reading/writing, inventory tracking, and smart shopping lists. Optimize expenses and reduce waste for hobbyists and professionals.

Highlights
  • NFC reading and writing for spool tags
  • Complete inventory management
  • Detailed statistics and value tracking
  • Automatic low stock alerts
  • Smart shopping list generation
  • Print settings configuration
  • Multi-device synchronization
Features
Read full description

Spool Master - The complete app to manage your 3D printing filament stock MAIN FEATURES NFC Reading and Writing • Read NFC chips from Anycubic, Bambu Lab, Prusa and Creality spools • Write your own custom NFC tags • Clone NFC tags for reuse • Compatible with all NFC tag formats Complete Inventory Management • Add spools by NFC scan or manually • Track remaining weight of each spool • Manage prices and calculate total value • Organize by brand, material and color • Automatic low stock alerts Detailed Statistics • Overview of your inventory • Total value of your stock • Number of materials, colors and brands • Automatic shopping list Smart Shopping List • Automatic addition of low stock spools • Mark ordered filaments • Add manually or by NFC scan Advanced Color Picker • Full palette with RGB sliders • Opacity support • Real-time preview Print Settings • Extruder temperatures (min/max) • Bed temperatures (min/max) • Filament diameter • Spool length COMPATIBILITY • Anycubic: Full reading and writing • Bambu Lab: RFID tag reading and writing • Prusa: OpenPrintTag reading and writing (NFC-V) • Creality CFS: Tag reading and writing • Generic NFC tags: Custom writing • Support for 22 filament brands • Support for 25 material types (PLA, PETG, ABS, TPU, etc.) MULTILINGUAL App available in 40 languages SYNCHRONIZATION • Multi-device synchronization • Offline mode available UNITS AND CURRENCIES • Multiple currency support • Metric or imperial units • Automatic conversion MODERN INTERFACE • Dark and light mode • Sleek design • Intuitive navigation • Visual statistics SECURITY AND PRIVACY • Your data remains private • Secure local storage PREMIUM VERSION AVAILABLE • Cloud synchronization • Ad-free • Priority support Whether you're a hobby maker or a professional 3D printer, Spool Master helps you optimize your filament management, reduce waste and control your expenses. Download now and take control of your filament inventory! https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Gauge4 screens
Spool Master4 screens

Verdict

The call

The clearest difference is ads: Gauge at none against Spool Master's shown. Spool Master's advantage is update cadence (every 4 days vs every 2 months) and iOS requirement (15.0 vs 18.5). On price, in-app purchases 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. Gauge sells 1 one-off in-app purchase and Spool Master sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Gauge ships an update every 2 months, Spool Master every 4 days. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 6 level
Gauge versus Spool Master: the parameters behind the verdict, then further details
ParameterGaugeSpool Master
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS18.515.0 — better
Further details — not scored
Size4 MB39 MB
Age rating4+4+
DeveloperHerri.es LimitedSebastien Girod

In-app purchases

1 purchases

Gauge

One-time1
  • Gauge Pro$4.99
2 purchases

Spool Master

Subscriptions2
  • Spool Master Monthly$1.991 Month
  • Spool Master Yearly$9.991 Year

Questions

Is Gauge free?
Gauge is free to download, with in-app purchases available.
Is Spool Master free?
Spool Master is free to download, with in-app purchases available.
Do Gauge or Spool Master have ads?
Spool Master shows ads; Gauge does not.
Which is updated more often, Gauge or Spool Master?
Gauge ships an update every 2 months, and Spool Master every 4 days. Most recently, Gauge was updated on September 20, 2026 and Spool Master on September 13, 2026.

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