The question almost always arrives attached to a number: a monthly data cap, a prepaid travel SIM with a few gigabytes on it, a roaming rate that pinches on every megabyte. Someone about to lean on live translation abroad wants to know whether a week of it will quietly drain the plan they bought for maps and messages. It is a fair worry, and the honest starting point is this: nobody — us included — can hand you an official megabyte figure per feature.
Short answer: The Even G2 has no SIM of its own, so it uses zero data directly — every byte it triggers is spent by your phone, on your phone's plan. Even Realities publishes no official per-feature data figures, and we will not invent them. Judged by what each feature actually does on the network, the picture is reassuring: notifications and notes are negligible, navigation is really your maps app's usage (and near-zero with offline maps), and live translation — short bursts of audio and text to the cloud — is the one ongoing consumer, but far lighter than video streaming. The only figure that is genuinely yours is the one your phone's own data meter shows. Below is how to read it.
Why there's no clean megabyte number to quote
Three reasons, and all three are more honest than any round number someone might otherwise hand you. First, the glasses have no network access of their own. They ride on your phone over Bluetooth, and anything bound for the internet goes through the phone and its plan — there is no separate "glasses line" to measure.
Second, the features that do reach the network do so through the phone's apps. Navigation runs through your maps app, translation through the Even app. Their usage therefore shows up in your data meter under those apps, not under a line item called "glasses". Third, Even quotes no per-feature figures, and any independent measurement swings wildly — depending on how much you translate, whether you're on Wi-Fi or cellular, and how talkative the moment is. A single number would mislead more than it helps.
A sense of scale — by analogy
What we can offer honestly is a comparison to things you already understand. The table below is explicitly an editorial placement by analogy, not a measurement — it tells you whether a feature sits in the "barely noticeable" camp or the "something is happening" camp, not how many megabytes an hour flow.
| Feature | What happens on the network | Rough order of magnitude |
|---|---|---|
| Notifications | Short snippets of text, mirrored from the phone | Negligible |
| Teleprompter & notes | Script downloaded once from the app, then local | A one-time download |
| AI prompts | Small text requests to the cloud | Light, text only |
| Navigation | Your maps app's usage; near-zero with offline maps | Like your maps app |
| Live translation | Short audio and text packets to and from the cloud | Light, but ongoing |
These orders of magnitude are analogies to familiar phone features, not measured or Even-published figures. Translation is described as cloud-based per the Even Support Center — Translate page. Your actual usage may differ substantially.
If we risk a single rule of thumb: a day with occasional translation feels, on the data meter, closer to a music-streaming session than to a video call. But please read that as an analogy, not a promise — and if every megabyte counts for you, measure it yourself rather than trust our guess.
How to measure your own usage
The best thing about this question is that you can answer it definitively for yourself in about a quarter of an hour. Your phone already counts usage per app — you just have to read the counter at the right moment.
- Reset the counter. iPhone: Settings › Mobile Data, scroll to the bottom › "Reset Statistics". Android: Settings › Network & internet › Data usage (the exact path varies by brand).
- Measure on cellular, not Wi-Fi. Only what travels over mobile data touches your plan. Turn Wi-Fi off for the test, or you'll measure nothing that counts.
- Use one feature deliberately. Ten minutes of live translation, say, or a real trip with navigation running. A clearly bounded session gives you a clean number.
- Read it per app. Translation shows up under the Even app, navigation under your maps app. That tells you which feature actually pulls data — and which barely does.
- Repeat per feature. After two or three sessions you have your own figures, which beat any estimate off the internet because they reflect how you use it.
What actually moves the needle
Three levers decide more than any manufacturer spec could. How often and how long you translate is the biggest — a business dinner interpreted end to end is a different thing from three sentences at a ticket counter. Whether you've loaded offline maps pushes the navigation share to essentially nothing; it's the easiest lever there is. And whether you're on Wi-Fi: on hotel or office Wi-Fi none of this costs your mobile plan a thing. The traveller who wants to save translates over Wi-Fi in advance and downloads the region's maps before the expensive SIM ever comes into play.
So: buy, skip, or test first?
Buy without worry if your data plan comfortably carries normal phone use. Nothing about the glasses demands a bigger tariff; with typical use they add little to your existing consumption, and most of that little is translation, which you control anyway.
Think twice if you plan to translate continuously for days on expensive roaming, never touching Wi-Fi. That's the one case where usage becomes noticeable — and even then the answer is preparation, not going without.
Test first for exactly what a spec sheet can't tell you: how much your style consumes. Bring your own phone to the Zürich showroom, translate for ten minutes over cellular, and read the meter. If translation is your main reason, our translation-glasses overview goes deeper; for a sober model-by-model view the AI glasses database helps.
Disclosure: AI-Eyewear is the authorised Swiss reseller of Even Realities. Where we don't have an official figure, we say so — rather than invent one.