The catch
ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
For automatic arrival, the phone needs connectivity, location access and compatible background settings.
Side by side
ULTRALOQ U-Bolt Pro WiFi vs eufy Security T8506: Both schedule guest codes, and ULTRALOQ can match a compatible key
Quick verdict
ULTRALOQ is the lock to pick if you want the door to unlock as you approach, or if you need a locksmith to match a compatible physical key. C220 is the choice for compatible eufy doorbell routines and USB-C emergency power. Scheduled guest codes work on both.
Before you buy
Why, and what it costs you
Using one physical key on two doors calls for a keyway check
When you want a compatible physical key to work on another door as well, ULTRALOQ has a manufacturer-documented rekeying route to take up with a locksmith. The C220 cylinder can’t be rekeyed. That may settle the purchase ahead of app features, though ULTRALOQ makes no promise of compatibility with every existing key or master-key system.
Where this comes from
A rekeyable Schlage C-keyway cylinder opens a conditional path to key matching, and C220’s non-rekeyable cylinder doesn’t. This is an inference about service compatibility. It makes no comparison of security ratings or installation cost.
The catch
eufy Security Smart Lock C220
You can’t rekey the cylinder so that it matches another household lock.
ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Why pick it
- Walk up and unlock, using the phone settings it requires
- Ask a locksmith whether another compatible household key can be matched
- The catch
- For automatic arrival, the phone needs connectivity, location access and compatible background settings.
eufy Security Smart Lock C220
- Why pick it
- Pair it with a USB-C emergency-power kit
- Run supported routines alongside a compatible eufy doorbell
- The catch
- You can’t rekey the cylinder so that it matches another household lock.
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What this page compares
ULTRALOQ U-Bolt Pro WiFi and eufy C220 side by side on guest codes, physical-key planning, emergency power and what each requires you to change on the door.
Begin with who needs access while you are away. Then check the physical key, the emergency cable and whether you may replace the deadbolt. Automatic arrival and guest entry are not the same requirement.
Which one fits
Pick the situations that sound like you
Share a physical key with another door
A locksmith can assess ULTRALOQ’s rekeying route for the Schlage C keyway. C220 cannot be rekeyed.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Depends
- eufy Security Smart Lock C220
- Not suitable
Pair the outside backup bank with only a USB-C cable
Emergency power on C220 is USB-C. ULTRALOQ calls for a Micro-USB cable or a different fallback.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Caution
- eufy Security Smart Lock C220
- Better fit
Have the door unlock by itself as the resident approaches
Auto-unlock works on ULTRALOQ with its required phone setup. C220 doesn’t offer the feature.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Good
- eufy Security Smart Lock C220
- Not suitable
Set up a scheduled keypad code for a visiting cleaner
Scheduled codes work on both. Before the visit, test the code and the times it is active.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Similar
- eufy Security Smart Lock C220
- Similar
Leave the original deadbolt cylinder as it is
Both replace the deadbolt. ULTRALOQ advises against reusing a third-party cylinder, and C220 comes with its own non-rekeyable cylinder.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Not suitable
- eufy Security Smart Lock C220
- Not suitable
Get in when the phone or home network is down
Each offers entry with a physical key. Keep an authorized, working key within reach instead of depending on remote control.
- ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- Similar
- eufy Security Smart Lock C220
- Similar
In practice
Differences you will notice
Using one physical key on two doors calls for a keyway check
When you want a compatible physical key to work on another door as well, ULTRALOQ has a manufacturer-documented rekeying route to take up with a locksmith. The C220 cylinder can’t be rekeyed. That may settle the purchase ahead of app features, though ULTRALOQ makes no promise of compatibility with every existing key or master-key system.
How we worked this out
A rekeyable Schlage C-keyway cylinder opens a conditional path to key matching, and C220’s non-rekeyable cylinder doesn’t. This is an inference about service compatibility. It makes no comparison of security ratings or installation cost.
C220 suits a backup bag with only USB-C
A backup kit you can reach from outside, holding a power bank and only a USB-C cable, fits C220’s emergency port. ULTRALOQ needs a Micro-USB cable instead. Before relying on either lock, add the correct cable or set up a physical-key fallback. Neither emergency port lets anyone in without an authorized credential.
How we worked this out
Set the documented exterior power connector against a hypothetical USB-C-only kit. A matching connector provides temporary power. It does not provide authentication, and it does not mean the internal AA batteries recharge.
With a code, a guest skips the resident’s arrival setup
ULTRALOQ’s auto-unlock suits a resident who will keep the required phone services and permissions active. A visiting cleaner or relative is different, since both locks provide scheduled codes and this job alone doesn’t favor ULTRALOQ. Set up and test the visitor’s access ahead of time, and keep a physical-key plan in case the phone or network connection fails.
How we worked this out
Treat these as two workflows. Automatic arrival on ULTRALOQ depends on the phone’s Wi-Fi, Bluetooth, internet and location settings. Scheduled keypad access is documented for both products, whereas C220 explicitly lacks auto-unlock. Nothing unverified about offline code syncing is assumed.
Option A
ULTRALOQ, U-Bolt Pro WiFi
U-Bolt Pro WiFi Smart Deadbolt
It lists fingerprint, keypad and phone entry, and its documented door range is 1.375 to 1.75 inches thick.
- Best for
- Walk up and unlock, using the phone settings it requires
Facts we checked
- Unlocking automatically on approach: Available, with phone and app prerequisites
- Changing which key fits: Schlage C keyway, so ask a locksmith about rekeying
- External power in an emergency: Micro-USB, with temporary power from a 5 V bank
- Guest entry on a schedule: Temporary and recurring scheduled codes
Option B
eufy Security, T8506
Smart Lock C220
You can enter by fingerprint, keypad or phone, and the documented door range is 1.375 to 2.17 inches thick.
- Best for
- Pair it with a USB-C emergency-power kit
Facts we checked
- Unlocking automatically on approach: Not supported
- Changing which key fits: Keys can be copied, but the lock cannot be rekeyed
- External power in an emergency: USB-C, with temporary power from a portable bank
- Guest entry on a schedule: Scheduled passcodes
Spec by spec
Where they really differ
| Spec | ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt | eufy Security Smart Lock C220 | In practice |
|---|---|---|---|
| Approach-based auto-unlock | Available with phone and app prerequisites | Not supported | A resident who wants this arrival workflow and accepts its phone settings is who ULTRALOQ suits. Deliberate fingerprint or code entry remains available on both. |
| Changing the physical key match | Schlage C keyway, ask a locksmith about rekeying | Keys can be copied, lock cannot be rekeyed | If you already have a compatible-key plan, ULTRALOQ can come out ahead once a locksmith has checked it. C220 needs a physical-key arrangement of its own. |
| Emergency external power | Micro-USB, temporary power from a 5 V bank | USB-C, temporary power from a portable bank | You need to be able to reach the bank and the correct cable from outside the locked home. Even with power, the lock still requires an authorized entry method. |
| Scheduled guest entry | Temporary and recurring scheduled codes | Scheduled passcodes | A prepared code lets a visitor in without having to adopt the owner’s arrival automation. Test the code and the period it is active before the visit. |
| Connection for remote control | Built-in Wi-Fi, no separate bridge needed | Built-in Wi-Fi, no separate bridge needed | A lock that needs no hub still can’t use remote control as an outage fallback. Keep a working physical key on hand in case phone or network access fails. |
| Keeping the original cylinder | Third-party cylinder retention is not recommended | Full replacement with a non-rekeyable cylinder | If the existing cylinder has to stay, neither is the right purchase. Get permission before you replace hardware on a rented door. |
Trade-offs
What each pick costs you
With ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
- A Micro-USB cable is required for emergency external power, and matching an existing key still needs a locksmith to check.
With eufy Security Smart Lock C220
- Approach-based auto-unlock is absent, but scheduled guest codes and deliberate entry methods are still there.
Change of plan
When the answer changes
A daily workflow that must include approach-based auto-unlock
Go with ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt. On ULTRALOQ it works once the resident accepts and tests the documented phone prerequisites. C220 offers no auto-unlock.
The backup kit has to stay USB-C-only, and rekeying isn’t needed
Go with eufy Security Smart Lock C220. That emergency connector is what C220 uses. For its external power port, ULTRALOQ requires a Micro-USB cable.
The door must keep its original cylinder
Neither model fits. Go with a retrofit arrangement that is confirmed compatible. Neither replacement in this comparison meets that restriction.
Decision guide
How to decide
To unlock on approach, or to have a locksmith match a compatible physical key, choose ULTRALOQ. For compatible eufy doorbell routines and USB-C emergency power, choose C220. Scheduled guest codes work on both.
Work out which kind of access each person gets
Someone who comes home with full hands may appreciate ULTRALOQ's approach-based unlock. Because it relies on phone services and permissions, test it on the phone that will really be used. Visitors, on the other hand, can get a scheduled code on either model. Set that access up and test it before you leave, rather than counting on a last-minute remote change reaching an offline lock.
Sort out the key and the emergency cable as a pair
You can copy C220's physical keys, but you cannot rekey its cylinder. ULTRALOQ instead offers a locksmith-reviewed Schlage C keyway path. Wherever you keep the approved key, make sure you can reach it if the phone or network fails. If the lock batteries run flat, the exterior ports are not the same, with Micro-USB on ULTRALOQ and USB-C on C220. Either way, temporary power still needs an authorized unlocking method.
Before you replace a rental's hardware, inspect the door
Each model takes the place of the deadbolt. ULTRALOQ does not recommend keeping a third-party cylinder, so if you must retain that cylinder, this is not the lock for you. With C220, verify a 35 to 55 mm door and more than 45 mm from the crossbore center to the handleset. For the supplied ULTRALOQ hardware, check the complete installation guide, bore and backset. If the door is rented, ask the owner before replacing its lock.
What this page can’t tell you
- No matched test of security, recognition reliability or battery duration picks a winner.
- Nothing promises that new or revoked codes sync to an offline lock right away, and remote access depends on connectivity.
- The rekeying guidance does not show that every existing key, cylinder or master-key system is compatible.
By the numbers
What the data shows
What we found across the smart locks we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt |
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| eufy Security Smart Lock C220 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
ULTRALOQ U-Bolt Pro WiFi Smart Deadbolt
Walk up and unlock, using the phone settings it requires
See price & reviews on Amazoneufy Security Smart Lock C220
Pair it with a USB-C emergency-power kit
See price & reviews on AmazonEach link opens in a new tab.
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