Certification, connectivity, published SAR, platform operator and data retention — in one table, for every device we cover. Filter it, sort it, and check any figure against its source.
Device
Segment
Connectivity
Sold via
Subscription
Compliance
SAR (W/kg)
Platform operator
Data storage & retention
ViaMondo status
Maker's page
“—” means the manufacturer publishes no figure. We say so rather than estimating one.
Every row shows the date it was last verified on the device's review page.
How to read this table
What each column means, and how to check it yourself
Connectivity — the radio the device uses on its own. LTE-M and NB-IoT trade speed for battery; 4G LTE supports voice and video but needs charging far more often.
SIM type — shown under the connectivity type, and a lock-in signal as much as a technical one.
pSIM — a physical SIM card in a tray. If the device is unlocked you can usually move it to another carrier, or take it abroad with a local SIM. More freedom, and one more thing to lose.
eSIM — the SIM is built into the chip and provisioned over the air. Simpler to set up and impossible to lose — but on most kids' watches it also means the device only works with the plan the brand sells, at whatever that costs next year.
Both — some devices support either, which is the most flexible arrangement.
The question worth asking before you buy: if this company doubles its monthly price, can I take the device elsewhere? With most eSIM wearables the answer is no.
Operating system — shown beneath the SIM type, and it predicts how long the device stays secure.
Android / Wear OS — full Google stack. Most capable, and the only one where security patches follow a published schedule you can check.
AOSP — Android Open Source Project, without Google's services. Common on kids' watches because it's cheap to license and easy to lock down. The catch: patches depend entirely on the manufacturer choosing to issue them, and many never do.
RTOS — a small real-time operating system rather than a general-purpose one. Excellent battery life and a much smaller attack surface, but limited features and rarely updatable in the field.
watchOS — Apple's. Long support, tightly controlled, and only on Apple hardware.
Why it matters: an AOSP watch that never receives a patch is running whatever was current when it shipped, for as long as the child wears it.
Sold via — through a mobile operator, or on the open market. A carrier-sold device has already cleared that operator's own testing and data-handling requirements on top of PTCRB, so this column doubles as a compliance signal in its own right.
Compliance — four separate things, shown as one column. Hover any badge for detail.
FCC — equipment authorization. Required by US law for any device with a radio, so this is the floor, not an achievement. The FCC ID is printed on the device or in its settings; look it up in the FCC database, which is also where published SAR figures come from.
PTCRB — North American carrier certification for cellular devices. Search the model at ptcrb.com. For a cellular wearable, absence is informative.
COPPA — certification under an FTC-approved COPPA Safe Harbor program: kidSAFE, PRIVO, TrustArc, iKeepSafe or ESRB. Worth understanding what a tick here does and doesn't mean. COPPA itself is a law, and every operator serving US children under 13 is bound by it whether or not they hold a certification. What a tick shows is that an FTC-approved body has audited the practices and stands behind them — a rarer and more checkable thing than a manufacturer stating its own compliance.
SAR — specific absorption rate, in watts per kilogram, shown with the standard and test position on the device's review page. Wrist devices are usually measured against the FCC's 4.0 W/kg extremity limit, not the 1.6 W/kg body limit used for phones, so figures are not comparable across categories. The full explanation →
Platform operator — who actually runs the back end. Frequently not the brand on the box.
Data storage & retention — three things about where your data goes and how long it stays.
Storage — the cloud provider actually holding the data, such as AWS, Azure or Google Cloud, where the company discloses it.
Region — the country it lands in, which decides which laws protect it and which authorities can reach it.
Retention — the actual period stated in the privacy policy, such as "24 months." We show Not stated in red where the policy commits to nothing — wording like "as long as necessary" is the most common case, and it is a finding rather than an answer.
Spotted something wrong?
Every figure here is checkable, which means errors are findable. If a number doesn't match what you're seeing — or you have a filing we've missed — email info@viamondo.com. We correct openly and note what changed.