Comparison

Filtrete Smart vs PurlBase

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

Head to head
About

Filtrete Smart

Manage your home's air quality with smart filter and purifier control. Receive personalized tips, alerts for filter replacement based on usage, and monitor outdoor air quality trends.

Highlights
  • Pair multiple smart air filters
  • Real-time filter life tracking
  • Smart air purifier control
  • Remote device management
  • Non-smart filter reminders
  • Outdoor air quality monitoring
Read full description

Filtrete™ Smart pairs with your Filtrete™ Smart Air Filter and Filtrete™ Smart Air Purifier to help you understand and manage your home’s air quality. It provides useful tips and alerts customized to your home’s environment, and will notify you when it’s time to replace your filters based on air flow and usage – not just time. With this app, you can • Pair multiple Smart Air Filters to track their life, and receive filter change notifications based on real usage • Pair Smart Air Purifiers to manage your indoor air quality – monitor and clean your air while remotely controlling your device by turning power on/off, setting different fan speeds, etc. • Scan the barcode of your non-smart Air Filters, and set timers to receive filter replacement reminders • Remember your filter type and size, and easily order replacement filters • Monitor outdoor air quality in multiple places, and view short and long-term trends • Receive tips and alerts to improve air quality

About

PurlBase

Features
Read full description

Every knitter and crocheter has a stash, and most of us have no idea what's actually in it. Purlbase fixes that, and does a lot more besides. Know exactly what you own Log your yarn with a photo: brand, colorway, dye lot, fiber content, and yardage remaining. Snap a label and you're done in seconds. See what you can make right now The "What Can I Make?" tool compares your real stash against a pattern library and shows you projects you can start today, no shopping trip required. See how much of a pattern's yardage your stash already covers, and how close you are to casting on. Find your people and your shops Discover local yarn shops, fiber festivals, and guild meetups near you, all in one map. Never miss a trunk show or a swap meet again. Give your yarn a second life List yarn you're ready to destash directly from your stash, complete with brand, weight, and dye lot. Set a watch for a specific yarn or colorway you need, and get notified the moment someone lists a match, including that one discontinued dye lot you've been hunting for. Purlbase helps you: Log yarn with a photo, including dye lot, so you never lose track of what you own Discover patterns you can make today with yarn already in your stash Browse shops, festivals, and guild meetups near you Buy, sell, and trade yarn with other makers, with alerts for the exact dye lot you need Whether you're building a stash, hunting for a match, or looking for your next local fiber festival, Purlbase brings your whole craft into one place.

Screenshots

Filtrete Smart4 screens
PurlBase4 screens

Verdict

The call

The clearest difference is ads: PurlBase at none against Filtrete Smart's shown. PurlBase also leads on update cadence (every 9 days vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Filtrete Smart ships an update every 2 months, PurlBase every 9 days. The most recent releases landed on September 30, 2026 and September 7, 2026 respectively.

Scorecard2 real differences · 8 level
Filtrete Smart versus PurlBase: the parameters behind the verdict, then further details
ParameterFiltrete SmartPurlBase
PriceFreeFree
Rating4.8 (52K ratings) — better—
Positive reviews38.8% of reviews—
Number of ratings52K — better—
Update frequencyEvery 2 monthsEvery 9 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size100 MB57 MB
Age rating4+4+
Developer3M CompanyKIMIE WELDON BOWSER

Bugs and requests

Filtrete Smart

Reported bugs

4 issues
  • Barcode scanning feature not working
  • App crashes when trying to add new filters
  • Bluetooth connection frequently lost
  • Incorrect filter life displayed in app

Requested features

5 requests
  • Allow manual filter life input
  • Provide more detailed air quality data
  • Integrate with other smart home systems
  • Add option to disable location tracking
  • Improve app stability and reliability

PurlBase

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Filtrete Smart

No in-app purchases

None

PurlBase

No in-app purchases

Questions

Is Filtrete Smart free?
Filtrete Smart is free to download, with no in-app purchases.
Is PurlBase free?
PurlBase is free to download, with no in-app purchases.
Do Filtrete Smart or PurlBase have ads?
Filtrete Smart shows ads; PurlBase does not.
Which is updated more often, Filtrete Smart or PurlBase?
Filtrete Smart ships an update every 2 months, and PurlBase every 9 days. Most recently, Filtrete Smart was updated on September 30, 2026 and PurlBase on September 7, 2026.

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