SpoolStack vs Filament Depot
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SpoolStack
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Never run out of filament mid-print again. SpoolStack is the ultimate inventory manager for 3D printing enthusiasts. Whether you have five spools or five hundred, SpoolStack removes the guesswork from your workshop so you can focus on creating, not stocktaking. EFFORTLESS INVENTORY MANAGEMENT Quick Add β add new spools in seconds with brand and type presets Visual Swatches β colour-coded swatches and Favourites for your go-to materials Smart Thresholds β custom Red and Amber alerts so you know exactly when to reorder On Order Tracking β mark spools as on order with a smart reminder to confirm your order was placed Settings & Support β rate the app, restore purchases, and get in touch directly from within the app SYNCS ACROSS ALL YOUR DEVICES β FREE Your inventory stays up to date everywhere. Add a spool on your iPhone, see it instantly on your iPad or any other iCloud-connected device. Cloud sync is included for every SpoolStack user, no subscription required. REORDER IN SECONDS Auto-Link β SpoolStack automatically matches your filament to reorder links One-Tap Shopping β buy the exact brand and colour you need without searching order histories Broad Support β optimised for Elegoo, Bambu Lab, eSUN, Polymaker, Sunlu, and more GO HANDS-FREE WITH PRO NFC Tagging β tap your phone to an NFC-tagged spool to subtract stock instantly QR Workflow β generate custom labels and scan to update inventory in a flash Unlimited Inventory β remove the 15-spool limit and track your entire collection TAKE CONTROL OF YOUR FILAMENT SpoolStack is free to use for up to 15 spools with cloud sync included. Join the pro makers using SpoolStack Pro to streamline their workflow with unlimited spools and hardware tagging. Privacy Policy: http://bit.ly/3PcUgFE Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Filament Depot
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Filament Depot is a clean, Apple-Healthβinspired iOS app for makers who print a lot. Track every filament spool you own as a colour ring with remaining filament at a glance β log usage as you print, follow price changes across vendors, and never run out mid-job. THE WALL β VISUAL INVENTORY Every spool gets its own concentric colour ring. The colour is the filament; the ring's thickness is what's left. Search by name or brand, filter by material, sort by lowest-first to instantly spot what needs reordering. LOG USAGE WITHOUT FRICTION Tap a spool, enter grams used, see exactly what's left after this print. Quick-pick buttons for 10, 25, 50, 100, 200g. Optional confirmation step you can switch off once you trust the flow. PRICE-AWARE TOP-UPS Every purchase is logged as a lot β its own date, price, and vendor. The Purchase History card shows your last paid price, your weighted average per kilogram, and the % change vs your previous lot. A new top-up that's more than 0.5% off the last price triggers an alert; above 10%, it warns you to double-check the vendor before saving. THOUGHTFUL TOUCHES β’ Concentric "activity rings" summary card β filament on hand, dry & ready, active spools β’ 7-day usage sparkline per spool β’ Light, dark, and auto themes with five accent swatches β’ Localised in English, Spanish, French, German, Italian, Japanese, Simplified Chinese, and Turkish FREE TIER Track up to 2 spools with the full design β no ads, no time limit, no upsell modals shoved in your face. PRO Β· $1.99 ONE-TIME UNLOCK β’ Unlimited spools β’ Full price history per spool with weighted-average and trend tracking β’ Add custom materials beyond the built-in PLA, PLA+, PETG, ABS, TPU 95A β’ One-time purchase, no subscription, no auto-renewal, no recurring fees PRIVACY-FIRST Filament Depot collects nothing. No analytics, no ads, no tracking SDKs, no servers. Your inventory lives on your device and is backed up only via your encrypted Apple device backup if you have one enabled. BUILT IN LONDON Made by Appricode Software Consultancy LTD. Send feedback right from the Me tab β we read every email. Privacy Policy: https://appricode.com/filament-depot/privacy.html Support: https://appricode.com/filament-depot/support.html Terms of Use: https://appricode.com/filament-depot/terms.html Welcome to Filament Depot. This first release ships the full inventory and price-tracking experience: β’ Visual spool wall with material filter, sort, and search β’ Tap any spool to log grams used and watch "remaining" update live β’ Top-up flow with automatic price-change alerts vs your previous lot β’ Pro unlock ($1.99 one-time) for unlimited spools, full price history, and custom materials β’ Light/dark/auto themes plus five accent swatches β’ Localised in 8 languages Tap Me β Send feedback and tell us what's missing. Use of this app is subject to Apple's Standard Licensed Application End User Licence Agreement (EULA), available in the App Store under "Licence Agreement" and at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
SpoolStack and Filament Depot are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SpoolStack sells 2 in-app purchases, starting at $4.99 per month and Filament Depot sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | SpoolStack | Filament Depot |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days | β |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 β better | 18.0 |
| Further details β not scored | ||
| Size | 13 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Howell | APPRICODE SOFTWARE CONSULTANCY LTD. |
In-app purchases
SpoolStack
- SpoolStack Pro Monthly$4.991 Month
- SpoolStack Pro Yearly$49.991 Year
Filament Depot
- Filament Depot Pro$1.99
Questions
Is SpoolStack free?
Is Filament Depot free?
Do SpoolStack or Filament Depot have ads?
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