# Soluna - Sleep debt tracker — Sleep debt & daily energy

> Sleep debt & daily energy (iPhone/iPad app by Yong Gao.)

- Source: https://appshunter.io/ios/app/soluna-sleep-debt-tracker/id6776861267 (this page in markdown: same URL + `.md`)
- Developer: [Yong Gao](https://appshunter.io/developer/1633835162)
- Category: Health & Fitness, Utilities
- Price: $9.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Chinese, Spanish
- Released: 2026-06-10
- Data updated: 2026-07-22
- User reviews in markdown: https://appshunter.io/ios/app/soluna-sleep-debt-tracker/id6776861267/reviews.md

## What is Soluna?

Most sleep apps bury you in charts. Soluna gives you one calm, clear picture: what your sleep is really costing you, how your energy will rise and fall through the day, and the few small things that make tonight better than last night.

It reads your sleep from Apple Health and turns it into something you can actually use — in plain, reassuring language instead of a spreadsheet.

YOUR SLEEP DEBT, AT A GLANCE
Soluna measures your sleep against your own personalized sleep need and shows your running sleep debt as a single, gentle number. Watch it ease down as you rest, with a quiet note on how last night moved it.

YOUR ENERGY, HOUR BY HOUR
Your focus isn't flat. It climbs to a morning peak, dips in the afternoon, and lifts again in the evening. Soluna maps your day as a smooth energy curve, so you can protect your sharpest hours for the work that matters and go easy when your body wants a break.

A SMART BEDTIME, MADE FOR YOU
From your sleep need and recent nights, Soluna suggests the best time to fall asleep tonight — and a calm wind-down window to help you get there.

HABITS THAT ACTUALLY HELP
No endless checklist. Just a handful of science-backed habits — morning light, a caffeine cut-off, dimming the lights before bed — each timed to your real schedule rather than a generic clock. Check them off through the day; they reset every morning.

GENTLE, OPTIONAL REMINDERS
Switch on a soft bedtime nudge, daily habit reminders, or a heads-up before each energy peak and dip. Every reminder is optional and easy to quiet.

WORKS WITH OR WITHOUT A WEARABLE
Connect Apple Health for sleep-adjusted insights, or simply set your usual wake and bedtime — Soluna will still shape your energy curve and habit timing around you.

PRIVATE BY DESIGN
Soluna has no account and no server. Your health data never leaves your device. No analytics, no advertising, no third-party tracking — and there never will be.

No sound libraries. No courses. No upsells. Just a calmer way to understand your sleep, and gently improve it.
Wake up to a clearer day. Download Soluna.

EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


## Version history (last 2 releases)

### 1.1 — 2026-06-16

Soluna now speaks your language. We added nine languages — Spanish, Chinese, Japanese, Korean, German, French, Portuguese, Italian, and Russian — with times, dates, and numbers shown in your local format. We also polished the home dashboard. Rest easy, in any language.

### 1.0 — 2026-06-10

No release notes.

## More apps by Yong Gao

- [Focus Town - Stay Focused](https://appshunter.io/ios/app/focus-town-stay-focused/id1633835160)
- [HabitPro - Habit Tracker](https://appshunter.io/ios/app/habitpro-habit-tracker/id1659075887)
- [Lofi Timer - Focus & Relax](https://appshunter.io/ios/app/lofi-timer-focus-and-relax/id6448956029)
- [Eatlicious - Meal planner](https://appshunter.io/ios/app/eatlicious-meal-planner/id6474037207)
- [留子厨房 - 智能菜谱助手](https://appshunter.io/ios/app/id6760367186)

All apps by Yong Gao: https://appshunter.io/developer/1633835162

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-22.*