TreasurySavers: T-Bill Log

TreasurySavers is a notebook for people who buy Treasury bills and I bonds themselves. You tell it what you hold and when it matures; it shows you the ladder, the calendar and what rolls over next. Everything stays on your phone.

TreasurySavers is not affiliated with the U.S. Department of the Treasury or TreasuryDirect. It is a record-keeping and planning tool, not an advisor, and it never connects to an account.

🪜 BUILD A LADDER YOU CAN SEE Lay out 4, 8, 13, 17, 26 and 52-week bills side by side and see what the rungs look like as a whole: what matures when, what the ladder averages, and where the gaps are. Change a rung and the picture updates.

📅 KNOW WHEN THE AUCTIONS ARE An auction calendar shows announcement, auction and settlement dates by term, with the business-day and federal-holiday rules already applied — including the awkward ones, like a New Year's Day that lands on a Saturday and is observed in the previous year.

💵 I BONDS, INCLUDING THE PARTS PEOPLE FORGET Track each I bond with its fixed rate and issue date, see the composite rate, and see where the three-month interest penalty stops applying. The redemption view shows which bond makes most sense to cash first if you need to.

📈 YIELD TRENDS Chart published yields over time by term so you can see whether short paper is paying more than long paper right now, instead of relying on a number you half-remember from last month.

🔔 ALERTS THAT MATTER Get told when an auction for a term you follow is coming up, and when one of your holdings is about to mature — the two moments where nothing happening means money sitting idle.

📦 WHAT IS INSIDE
• Ladder planner across all standard bill terms
• Holdings list with maturity dates and projections
• Auction calendar with holiday-aware settlement dates
• I bond tracker with composite rate and penalty window
• Redemption ordering for I bonds
• Yield history charts
• CSV export of everything you have entered
• Dark mode and 13 languages
• No account, no linking, no sign-in

⚠️ PLEASE READ Every figure TreasurySavers computes is a projection based on what you entered and on published public data, shown alongside its inputs. Projections are not forecasts, guarantees or recommendations. TreasurySavers does not provide investment, tax or legal advice, does not execute purchases, and does not connect to TreasuryDirect or any brokerage. Check anything that matters against the official source before you act on it.

🏛 NOT A GOVERNMENT APP

TreasurySavers is an independent app made by Mobilia Apps. It is not affiliated with, endorsed by or operated by the U.S. Department of the Treasury, TreasuryDirect, the Bureau of the Fiscal Service or any other government entity, and it does not represent a government entity.

🔗 OFFICIAL SOURCES

Rates, auction dates and redemption rules are published by the Treasury, and its own site is the only place to buy, hold or redeem anything:
• TreasuryDirect: https://www.treasurydirect.gov
• Upcoming auctions: https://www.treasurydirect.gov/auctions/upcoming/

🔓 WHAT PREMIUM ADDS Without it you can keep three holdings, one ladder and two alert terms. Premium unlocks unlimited holdings and ladders, alerts on every term, long-range yield history, the I bond redemption optimiser, CSV export and no ads — as a monthly or yearly plan, or one lifetime payment.