Gauge vs Spool Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gauge
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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.
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.
- 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
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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
Verdict
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
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.
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.
| Parameter | Gauge | Spool Master |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Herri.es Limited | Sebastien Girod |
In-app purchases
Gauge
- Gauge Pro$4.99
Spool Master
- Spool Master Monthly$1.991 Month
- Spool Master Yearly$9.991 Year
Questions
Is Gauge free?
Is Spool Master free?
Do Gauge or Spool Master have ads?
Which is updated more often, Gauge or Spool Master?
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