VivoKey Apex Flex
Experimental implanted electronic identification or secure-element hardware
Keep in mind Manufacturer states its finished implants are not government-certified for implantation or use inside the human body.
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VivoKey Spark 2
Experimental implanted electronic identification or secure-element hardware
Keep in mind Manufacturer states its finished implants are not government-certified for implantation or use inside the human body.
Published specifications and documented constraints. See the full comparison below for prices and sources.
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| Frontier & researchAdd a model |  |  |
|---|---|---|
| Prices · all markets | $349 USD≈ €312 EURECB 2026-10-12US · Store price · Stock and delivery not verified 1 offer records & sources$349 USD≈ €312 EURECB 2026-10-12 US · Store price Stock and delivery not verifiedVivoKey VivoKey Apex Flex hardware Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included.Check merchant offer ↗Price source ↗ Checked 2026-10-12 | $50 USD≈ €45 EURECB 2026-10-12US · Store price · Stock and delivery not verified 1 offer records & sources$50 USD≈ €45 EURECB 2026-10-12 US · Store price Stock and delivery not verifiedVivoKey VivoKey Spark 2 hardware Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included.Check merchant offer ↗Price source ↗ Checked 2026-10-12 |
| Designed for | Experimental implanted electronic identification or secure-element hardware ↗ | Experimental implanted electronic identification or secure-element hardware ↗ |
| Form factor | Subdermal electronic transponder ↗ | Subdermal electronic transponder ↗ |
| Chip Platform | JCOP4 / Java Card3.0.5 ↗ | Not applicable to this category |
| Application Memory | 83,872 bytes EEPROM ↗ | Not applicable to this category |
| Cryptography | RSA, ECC, AES and3DES applets ↗ | AES128 challenge-response ↗ |
| Software Provisioning | Fidesmo applet deployment ↗ | Not applicable to this category |
| Payment | Not supported by Apex Flex ↗ | Not applicable to this category |
| Dimensions | Narrow8x28 mm; Module14x35 mm; Spectrum22x1.9 mm disc; one family profile ↗ | 2.1x14 mm ↗ |
| Construction | Flexible biopolymer encapsulation ↗ | Cylindrical glass package ↗ |
| Operating frequency | Not applicable to this category | 13.56 MHz ↗ |
| Nfc Standard | Not applicable to this category | ISO14443A / NFC Type4 ↗ |
| Data Storage | Not applicable to this category | No general-purpose user-data storage ↗ |
| Function | Not applicable to this category | Cryptographic digital-identity authentication ↗ |
| Availability | Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included. | Manufacturer US product price for the implant configuration without reader/programmer add-ons. Professional placement cost not included. |
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| Editorial pick & release | No editorial ranking recorded | No editorial ranking recorded |
| Evidence | Manufacturer source Checked 2026-10-13 | Manufacturer source Checked 2026-10-13 |
Battery claims use different conditions and are not a controlled benchmark. “Not verified” is an evidence gap, not a missing feature. Prices are dated regional snapshots. Deposits, bundles and historical launch prices are labelled. Brightness measurement methods and battery workloads vary by manufacturer.