They answer different wishes. Loona, at about $449 to $499, is a finished pet: out of the box it roams, plays, recognises faces, talks through ChatGPT and finds its own charger, and the owner's job is to enjoy it. Petoi Bittle X, at $279, is a palm-sized robot dog that arrives as parts: you assemble it, then program it in Python, block code or the app, and the joy is in making it walk and trick. Loona is for a living room and a family; Bittle is for a workbench, a classroom or a teenager who wants to know how the dog works. One is a pet; the other is a course that happens to be a pet.
Free: the Mini Robot Guide, every finished robot pet you can buy, with kits listed separately → Download the report
How do Loona and Bittle compare on the facts?
| Loona | Petoi Bittle X | |
|---|---|---|
| Price | about $449 to $499 | $279 |
| What arrives | a finished robot | a kit of servos, frame and controller board |
| Time to first play | minutes | an afternoon of assembly, longer to program |
| Movement | wheels; roams a room | four legs; walks, trots, tricks on a table or floor |
| Personality | built in, develops with use | what you program |
| Speech | ChatGPT conversation, voice | voice commands on the X model; no conversation |
| Camera | yes, face and gesture recognition | optional module |
| App and Wi-Fi | required | app or computer; runs offline once programmed |
| Programming | none offered | Python, C++, block-based; open source |
| Made by | KEYi Tech | Petoi |
| Maker's age rating | 6 and up | 10 and up |
What does Loona give you that Bittle cannot?
A pet on day one. Loona's behaviours, moods and games are the product; it comes when called, sulks, plays fetch, recognises the family and takes itself to bed. Nothing about it asks you to understand it, and for most buyers that is the point. What it cannot be is yours in the sense of made by you: it does what KEYi's software does, and there is no programming path.
What does Bittle give you that Loona cannot?
The inside. Bittle is open: you build it, you see the servos, you write the gaits, you add a camera or a sensor, and when it walks it is because you made it walk. Petoi publishes the code and the curriculum, which is why Bittle is the robot in coding clubs and school STEM lessons, and why a parent who is also a teacher can run a term of classes with one; that use is in Can a robot pet earn money for its owner?. What it cannot be is a companion: it has no face, no moods and no personality beyond what you give it, and a child who wanted a pet will be disappointed by a box of servos.
Who is each one for?
Loona: a family, a living room, a wish for a creature. Bittle: a teenager, a classroom, a wish to build. The dividing question is one sentence: do you want the dog, or do you want to make the dog? We compared the two makers' pages and the reviews on that question and found no disagreement anywhere; the only people unhappy with either bought it wanting the other. If what you want is a small companion for a desk without either the price or the assembly, Eilik at about $149 is the third answer, and the pet-versus-companion distinction is in What is a robot pet, and what does it actually do?.
To put Loona, Bittle and a third robot side by side, use our compare tool; the age question for a child is in Which robot pets suit kids, and from what age?.
Prices and details checked on the makers’ own stores.
FAQ
Is Petoi Bittle a robot pet?
It is a robot dog kit you assemble and program. It walks and does tricks, but it has no face, moods or personality beyond what you give it; it is a project more than a pet.
Can Loona be programmed?
No. KEYi offers no programming path; Loona's behaviours come from its app and updates.
Is Bittle good for kids?
For a child who wants to build and code, yes; Petoi publishes a curriculum and it is used in schools. For a child who wants a pet, no.
How long does Bittle take to build?
An afternoon for assembly, then as long as you like for programming; it runs offline once programmed.
Which is better for a classroom, Loona or Bittle?
Bittle, because it is open and teaches; Loona is a finished product with no programming path.
Sources
- KEYi Tech, Loona product pages, 2026 (behaviours, ChatGPT, auto-docking, no SDK).
- Petoi, Bittle X product, documentation and education pages, 2026 (kit contents, Python and block programming, open source, curriculum).
- Robot Review Desk, Loona review, 22 June 2026.
- Energize Lab, Eilik page, 2026.
Finished pets and kits, listed apart. The Mini Robot Guide lists every robot pet you can buy with what it does, and marks the kits so nobody buys a box of servos expecting a creature. Free, one email. → Download the report
