Development costs, in the open.

Hex NFC is free and source-available: no paywalls, no paid tier, nothing held back. If it is useful to you, a donation helps recover what it cost to build. Here is the full ledger, and where things stand.

Costs recovered

A$0.00 of A$280.02 · 0%

Chip in to help cover the costs below. A one-time, secure payment through Stripe. No account needed.

Amounts in AUD. A voluntary contribution to support development: not a purchase, not tax-deductible, and it unlocks nothing in the app because nothing in the app is locked.

The ledger

Every dollar, itemised.

Apple Developer Program
Annual membership required to ship on the App Store.
A$137.69
NFC test tags & chips
NTAG213 ×25 (various antennas & form factors), NTAG216 ×3, NTAG424 DNA ×2, MIFARE Ultralight EV1 128-byte ×2, MIFARE Ultralight C ×10, MIFARE Classic EV1 1K ×2, MIFARE DESFire EV3 ×2, ICODE SLIX ×1, ICODE SLIX2 ×3, plus 100 refurbished assorted tags.
A$99.89
Tag shipping
Postage for the test tags above.
A$32.44
Myki transit card (DESFire EV3)
For transit-card read testing.
A$5.00
Pasmo / Suica transit card
For transit-card read testing.
A$5.00
Total
A$280.02

These figures are maintained by hand and updated as the project grows. The same numbers power the “Development Costs Recovered” card inside the app.