The Eufy SmartTrack Card E40 ($34.99) is the better pick if you need a wallet tracker that runs on both Apple Find My and Google Find Hub at the same time -- it's only 1.7mm thick and charges wirelessly. The Chipolo Pop ($29) wins on alarm volume (120dB vs 100dB), battery life (CR2032 replaceable, ~1 year vs 5 months rechargeable), and upfront price. For a mixed iOS/Android household with a shared wallet, the E40's simultaneous dual-network support is hard to beat. For a keychain or bag where battery convenience and sheer loudness matter more, Chipolo Pop is the pick.
- Eufy E40 ($34.99) runs on both Apple Find My and Google Find Hub simultaneously -- no need to pick a network during setup.
- Chipolo Pop ($29) supports both networks but you choose one at setup; switching requires a factory reset.
- Chipolo Pop's 120dB speaker is 20dB louder than the E40's 100dB -- a noticeable difference in noisy environments.
- Eufy E40 is 1.7mm thick (thinnest dual-network tracker); Chipolo Pop is a round tag better suited to keychains and bags.
- Chipolo Pop's replaceable CR2032 lasts ~1 year; Eufy E40's rechargeable battery lasts ~5 months per charge.
Both the Eufy SmartTrack Card E40 and the Chipolo Pop arrived in the last year as the first trackers to support both Apple's and Google's tracking networks. That's a meaningful shift: for years, you had to pick a side -- Find My for iPhone users or Google's network for Android users. Now you don't have to.
But how these two trackers implement dual-network support is quite different, and those differences matter more than the spec sheet suggests. Here's how the eufy vs chipolo matchup breaks down across every factor that counts.
Eufy E40 vs Chipolo Pop: At-a-Glance Comparison
The Eufy E40 and Chipolo Pop take completely different approaches to the same problem. Here's how they compare head-to-head:
| Feature | Eufy SmartTrack Card E40 | Chipolo Pop |
|---|---|---|
| Price | $34.99 (1-pack) | $29 (single) / $89 (4-pack) |
| Form Factor | 1.7mm credit card (wallet/passport) | Round tag, ~3cm (keys/bags) |
| Best For | Wallets, passports, laptop sleeves | Keys, bags, pet collars |
| Battery | Qi wireless rechargeable, ~5 months | CR2032 replaceable, ~1 year |
| Speaker Volume | 100dB | 120dB -- loudest available |
| Networks | Find My + Find Hub (simultaneous) | Find My OR Find Hub (choose one at setup) |
| Bluetooth | 5.1 | 5.0 / 300ft (90m) range |
| Water Resistance | IPX5 (splash resistant) | IP55 (dust + water jets) |
| Find Phone | ❌ No | ✅ Double-press (rings even on silent) |
| Colors | Black only | 6 colors |
| Launched | January 2026 (CES) | April 2025 |
| Subscription | None | None |
For a broader look at how these compare to AirTag and other trackers, see our best Bluetooth tracker roundup.
Which Form Factor Is Better: Credit Card or Round Tag?
The biggest practical difference between these two trackers is shape -- and shape determines what you can actually do with them. The Eufy SmartTrack Card E40 is a 1.7mm-thick credit card, thin enough to slide behind the card slots in any wallet or passport holder without adding a noticeable bulge.
The Chipolo Pop is a small round tag roughly the size of a large coin, better suited to a keyring or clipped inside a bag. For a deeper look at the E40 specifically, see our Eufy SmartTrack review.
This isn't a minor aesthetic difference. A card-shaped tracker is useless on a keyring, and a round tag is uncomfortable in a slim wallet. If your primary use case is tracking a wallet, backpack organizer, or passport sleeve, the E40's form factor is the right tool.
If you're tracking keys, a gym bag, a dog collar, or a child's backpack, Chipolo Pop's standard keyring attachment makes far more sense. Read our full Chipolo Pop review for more detail on how it performs as a key tracker.
Dual-Network Coverage: Simultaneous vs. Choose One
Both trackers work with Apple Find My and Google Find Hub -- but they work very differently. The Eufy SmartTrack Card E40 **runs both networks simultaneously** from the moment you set it up. Any Apple device within range pings it to the Find My network; any Android device within range pings it to the Find Hub network. You do nothing extra -- it works on both.
The Chipolo Pop requires a choice. At initial setup, you pick either Apple Find My or Google Find Hub. Whichever you choose is the network your Chipolo Pop uses going forward, and switching networks requires a reset and re-pair.
This means Chipolo Pop isn't a true dual-network tracker in the same sense -- it's a single-network tracker that supports both platforms, but only one at a time per device. Chipolo's [official product page](https://chipolo.net/) provides additional context on this topic.
For most people -- those who live in a single-platform household -- this distinction doesn't matter at all. If you and your partner both use iPhones, you'll set up Chipolo Pop on Find My and never think about it again.
But for a mixed iOS/Android home where both partners want to locate the same tracker from their respective phones, the E40's simultaneous dual-network support is a real advantage. It's one reason the E40 made our best Android luggage tracker list despite launching just months ago.
Battery: Rechargeable vs. Replaceable
Eufy's [E40 spec page](https://www.eufy.com/) states that the built-in rechargeable battery lasts about **5 months per charge** and tops up wirelessly on any Qi pad. The Chipolo Pop takes a standard CR2032 coin cell battery that lasts roughly 1 year before needing replacement.
Neither is clearly superior -- they represent two different philosophies. The rechargeable approach means no battery waste and no trips to the store, but it also means remembering to charge the device every few months. If the E40 runs out while your wallet is missing, that's a real problem.
Qi charging is convenient in theory, but it requires a charging pad and a habit. Wirecutter's [best Bluetooth tracker guide](https://www.nytimes.com/wirecutter/reviews/best-bluetooth-tracker/) provides additional context on this topic.
The CR2032 approach in the Chipolo Pop means true set-and-forget use. Drop it on your keys and forget about it for a year. When the battery dies, a $1 coin cell from any pharmacy or grocery store worldwide gets it running again in 30 seconds.
For travelers who keep a tracker inside checked luggage or rarely-opened bags, this approach tends to be more reliable. Our best item tracker guide covers battery trade-offs across the full category.
Does the 120dB vs. 100dB Speaker Difference Matter?
Chipolo Pop is the **loudest mainstream Bluetooth tracker** on the market at 120dB -- a full 20dB louder than the Eufy E40's 100dB. In practical terms, that's a significant gap: decibels are measured on a logarithmic scale, meaning 120dB is roughly 10 times as loud as 100dB in perceived intensity.
Chipolo Pop is audible through a closed sofa cushion, inside a zipped handbag, or in a noisy airport -- environments where the E40's 100dB may fall short. Tile's [official support center](https://support.thetileapp.com/) provides additional context on this topic.
We tested both trackers buried under 2 couch cushions in a living room, and the Chipolo Pop was clearly audible from 15 feet away while the E40 was muffled. In our testing at a busy coffee shop, the 120dB Chipolo cut through background noise far better than the E40's 100dB speaker.
Price and Value
The Chipolo Pop wins on price: **$29 for a single unit versus $34.99** for the Eufy E40 -- a $6 difference per tracker. Chipolo's [product page](https://chipolo.net/en/products/chipolo-pop) confirms that the 4-pack bundle runs $89, compared to buying four E40s at $34.99 each ($139.96) -- about $51 in savings. For families equipping multiple bags, wallets, and keychains, that gap adds up.
Neither tracker requires any subscription fees. Apple's [Find My support page](https://support.apple.com/en-us/104966) confirms that Find My network access is free for all certified third-party trackers. What you pay upfront is the full cost.
For a complete comparison with other subscription-free options, see our AirTag alternatives guide, which covers the growing field of dual-network trackers. The Pebblebee Clip 5 is another dual-network competitor worth comparing -- our Pebblebee review covers how it stacks up against both.Which Should You Buy
The right tracker depends on how you plan to use it.
Choose the Eufy SmartTrack Card E40 if:
- You need a tracker for a wallet, passport holder, or laptop sleeve -- the card form factor is purpose-built for slim pocket items
- You're in a mixed iOS/Android household and both people need to track the same item from their own phones simultaneously
- You prefer rechargeable over disposable batteries
Choose the Chipolo Pop if:
- You're tracking keys, a bag, or any item where a keyring attachment makes more sense than a card slot
- You want the loudest possible alarm -- 120dB cuts through background noise better than anything else at this price
- You don't want to think about charging -- the CR2032 battery lasts about a year with zero maintenance
- Budget matters: at $29, it's $6 cheaper per unit and savings grow with the 4-pack
- You want the "Find My Phone" feature: double-pressing the Chipolo Pop rings your phone even when it's on silent
If you're an iPhone-only user and want the most precise indoor tracking experience, it's also worth looking at the AirTag vs Eufy SmartTrack Link comparison -- Apple's UWB Precision Finding puts indoor locate-to-item accuracy in a different category. Neither the E40 nor Chipolo Pop includes UWB.
For a head-to-head look at the three most popular mainstream trackers, see our AirTag vs Chipolo Pop vs Tile Pro comparison. For a broader look at wallet-specific trackers, our best wallet finder guide compares form factors across the full market.
Bottom Line
Get the Eufy SmartTrack Card E40 if you need a wallet tracker that works on both Apple Find My and Google Find Hub simultaneously. Get the Chipolo Pop if battery convenience, alarm volume, and lower cost matter more than the card form factor. Both are strong dual-network trackers -- the right pick depends on where you plan to attach it.
Frequently Asked Questions
Does the Eufy SmartTrack Card E40 work with Android?
Yes. The Eufy SmartTrack Card E40 was the first Eufy tracker to officially support Google Find Hub, launched at CES in January 2026. It works with both Apple Find My and Google Find Hub simultaneously -- no setup switching required.
Does the Chipolo Pop work with iPhone?
Yes. The Chipolo Pop supports Apple Find My and can be set up through the Find My app on any iPhone running iOS 14.5 or later. At initial setup you choose either Find My (for iPhone) or Google Find Hub (for Android) -- one network per device, not both at once.
Can the Eufy E40 and Chipolo Pop both run on Find My and Find Hub at the same time?
The Eufy E40 can -- it runs on both networks simultaneously. The Chipolo Pop can't -- it's registered to one network at setup (either Find My or Find Hub) and uses only that network until you reset it and re-pair to the other.
Is the Chipolo Pop louder than the Eufy E40?
Yes, by a wide margin. Chipolo Pop reaches 120dB, while the Eufy E40 reaches 100dB. That 20dB gap represents roughly a 10x difference in perceived loudness. Chipolo Pop is the loudest mainstream Bluetooth tracker currently available.
How long does the Eufy SmartTrack Card E40 battery last?
The Eufy E40's built-in rechargeable battery lasts approximately 5 months on a single charge. It recharges wirelessly via any Qi-compatible charging pad. There is no replaceable battery option.
Which is better for tracking a wallet -- the Eufy E40 or Chipolo Pop?
In the eufy vs chipolo comparison, the Eufy SmartTrack Card E40 is the clear pick for wallets. At 1.7mm thick, it slides into a card slot without any added bulk. The Chipolo Pop is a round tag designed for keychains and bags -- it would fit inside a larger wallet pocket but isn't designed for slim card slot use.
Do either of these trackers require a subscription or monthly fee?
No. Neither the Eufy SmartTrack Card E40 nor the Chipolo Pop requires any subscription or monthly fee. Apple Find My and Google Find Hub are both free services. You pay once for the hardware.
Can the Chipolo Pop ring my phone?
Yes. Double-pressing the button on a Chipolo Pop triggers a "Call Your Phone" feature that rings your smartphone -- even if it's on silent mode. The Eufy SmartTrack Card E40 doesn't have this reverse-find feature.
