# AISixteen

> AISixteen is an independent developer of small, fast, private apps for iPhone, iPad, Mac and Apple Watch. No accounts, no tracking, and no personal data ever leaves the user's device.

## About
- No account or sign-up is required for any app, and there are no subscriptions.
- No personal data is collected, stored, or transmitted by any app.
- Every app works offline, except Earth Around, which fetches public NOAA space-weather feeds to show live readings (it still collects nothing about the user).
- Ephemeris Sky computes offline too; charts a user saves sync through that user's own private iCloud container, never through AISixteen servers.
- Apps are downloaded from the Apple App Store.

## Apps
- [Ephemeris Sky](https://apps.apple.com/app/id6782659268): Real geocentric planetary positions, aspects and a live chart wheel for any moment, plus your saved natal chart with transits, synastry that ranks every contact between two charts, scored dignities and chart balance, solar and lunar returns to the minute, house systems (Placidus, Koch, Whole Sign and more), and an event timeline of ingresses, lunations and aspects. Computed on-device; saved charts sync through your own iCloud. (Sky & science)
- [Overtone Lab](https://apps.apple.com/app/id6787524729): Twenty exact, reference-validated audio tools — tempo, SMPTE, pitch and harmonics, room acoustics, filters, and LUFS loudness. Offline and private. (Creative tools)
- [Indox Text](https://apps.apple.com/app/id1603883417): On-device AI that summarizes articles, documents, and web pages using the device's CPU and Neural Engine. Works offline; iPhone, iPad, Mac, and a Safari extension. (AI & utilities)
- [Typing Mill](https://apps.apple.com/app/id1631148042): Typing practice with real words across four difficulty levels, in an animated interface. (AI & utilities)
- [Golden Ratio Calculator](https://apps.apple.com/app/id1570841203): Reactively calculates the lesser, greater, and whole parts of the golden ratio with professional precision. (Creative tools)
- [Golden Ratio Calculator Lite](https://apps.apple.com/app/id1570956847): A simple, streamlined golden-ratio calculator for quick design work. (Creative tools)
- [Big Pink Cat](https://apps.apple.com/app/id6497066161): A cosmic, choose-your-path interactive story. (Games)
- [Skyscraper Frog](https://apps.apple.com/app/id1563057204): An 8-bit game about guiding a frog across the rooftops of the tallest skyscrapers. (Games)
- [Monstro Shooter](https://apps.apple.com/app/id6752858611): An intense top-down wave-survival shooter across Mars deserts and asteroid fields. (Games)
- [Kerf Calc](https://apps.apple.com/app/id6788179502): An offline construction field calculator — feet-inch-fraction math plus framing (rafters, stairs to code), concrete, rebar, roofing and materials; each tool shows the formula and the code it cites. (Creative tools)
- [AirCore: HVAC Calculator](https://apps.apple.com/app/id6799999307): An offline air-side HVAC calculator — enter any two of dry bulb, wet bulb, dew point, relative humidity, humidity ratio, enthalpy or specific volume and it solves the whole moist-air state on a real psychrometric chart, corrected for site elevation rather than sea level. Also air-side heat, air mixing by mass, duct sizing from friction, fan laws, and pipe sizing by Darcy and Hazen-Williams. It computes air properties and sizes; it has no fitting library and does not do load calculations. iPhone, iPad, Mac and Apple Watch. (Creative tools)
- [Storypole](https://apps.apple.com/app/id6796056413): An offline job-site calculator for carpenters and framers — feet-inch tape math, equal spacing and on-center layout, board feet with nominal-vs-dressed lumber sizes, roof pitch and rafters, miters and bevels, concrete takeoff and wire gauge. iPhone, iPad, Mac and Apple Watch. (Creative tools)
- [Par](https://apps.apple.com/app/id6795570043): An offline financial calculator with ten tools — time value of money, amortization, bonds, cash flow, day count, depreciation, percent, rate conversion, real estate and statistics — where every displayed number traces to a cited authority (US Treasury, CFPB Regulation Z and DD, IRS, NIST). Built for loan officers, underwriters, fixed-income desks and exam candidates. (Creative tools)
- [Marine Nav](https://apps.apple.com/app/id6795571481): An offline marine navigation toolkit — tide and tidal-current predictions with slack water, celestial sight reduction from sextant altitude, magnetic declination from the World Magnetic Model, and great-circle distance and bearing. Works with no signal at sea. (Sky & science)
- [Earth Around](https://apps.apple.com/app/id6794748918): Live space weather — NOAA G/R/S storm scales, solar wind speed and Bz, GOES X-ray flare flux, tonight's aurora chance and view line, and Hp30 at 30-minute resolution. iPhone, iPad, Mac and Apple Watch. Needs a connection for live readings; no account, no tracking. (Sky & science)
- [TrueCourse E6B](https://apps.apple.com/app/id6788926819): A modern E6B flight computer for pilots and CFIs — wind triangle, true airspeed and Mach, density altitude, nav log, fuel, climb/descent, and weight & balance, computed from validated FAA and ICAO Standard Atmosphere formulas. Offline, no account. (Sky & science)

## Contact
- Email: info@aisixteen.com
- Website: https://aisixteen.com