Small, durable apps for everyday use.
Tahonest is a one-person studio. We build few things, build them carefully, and keep them running for the long haul.
Why Sổ Nhà exists
Without Sổ Nhà
- Month's end arguments over who paid for what
- A spreadsheet that lasts three days
- Everyone has a different number, none of them agree
With Sổ Nhà
- Every entry records the payer, the moment it's spent
- The whole household opens the app and sees one picture
- Month's end works out who is ahead, split fairly
- 0ads
- 0bank links
- Singaporewhere data lives
- 1 tapto delete account & data
Products
Recent notes
6 September 2026
Sổ Nhà enters closed testing
Sổ Nhà — the household's shared spending book — is on Google Play in closed testing. A few words about it and about the studio.
Try Sổ Nhà
One clean shared book for the household — no ads, no data selling.
More small apps in the same spirit are in the works. New things will show up here.