# KeyStone: Winter Arc Habits — 90 Day Challenge & Streaks

> 90 Day Challenge & Streaks (iPhone/iPad app by TechSpells LLC.)

- Source: https://appshunter.io/ios/app/keystone-winter-arc-habits/id6759814300 (this page in markdown: same URL + `.md`)
- Developer: [TechSpells LLC](https://appshunter.io/developer/1809574785)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 16.0 · 63 MB
- Languages: American English
- Released: 2026-04-03
- Data updated: 2026-11-09

## What is KeyStone?

Your Winter Arc, one habit at a time.
90 days. 3 habits. One by one. Miss a day and you fall back one step. Never back to zero.

KeyStone turns a 90 day challenge into a plan you can follow. Pick 3 habits, in order. The first starts on Day 1. The next one joins only after 10 straight days of the one before, so you never pile everything on at once.

HOW YOUR ARC WORKS
• Pick 3 habits from a library of 40. Your first pick starts Day 1.
• KeyStone builds your 90-day plan: the date each habit joins, when each level starts, and the buffer days you have for misses.
• Press and hold to commit. Locked in. Day 1 is today.

THE DAY'S ACTIONS, NOT A BLANK CHECKBOX
Every habit hands you specific daily actions, grouped by morning, afternoon and evening, with a short why for every action. Wake Up Early starts with "Set alarm 15 min earlier", not "wake up at 5". Tick every action and the habit is done for the day.

4 LEVELS PER HABIT
Foundation, Discovery, Practice, Mastery. A level opens only when you earn it: a streak of 3, 7, 14, then 21 straight done days. At each level-up you set the next level's actions: core actions, optional ones you choose, and your own. After Level 4 the habit is Mastered and moves to a weekly check-in.

FIBONACCI STREAKS THAT BEND INSTEAD OF BREAKING
Streak steps follow the Fibonacci numbers: 1, 2, 3, 5, 8, 13, 21. Miss a day and you drop one step: 13 becomes 8. From day 2, a missed day never takes you back to 0. Several days away count as one miss.

SEE WHERE YOU STAND
• Today: Day N of 90, your habits and today's actions
• Arc: all 90 days at a glance, done, partial or missed
• Live finish dates and buffer days that move when you slip
• A once-a-day mood check
• Share cards for done days and mastered habits
• Reminders for each habit at the time you pick, plus a 10 PM nudge if nothing is ticked yet

THE SEASON COMES FROM THE DATE
Start between October and December and your arc is a Winter Arc. Start in January and it's a New Year Arc. Any other month, it's a 90-Day Arc. Same 90 days, same rules.

40 HABITS IN 6 CATEGORIES
Health, Mind, Growth, Discipline, Social and Rest: wake up early, daily exercise, daily reading, phone-free morning, cold exposure, sleep routine, meditation, walk 8,000 steps, cut added sugar, eat the frog, digital sunset and more. Build good habits (33 of them) and break bad habits (7), with 919 actions in all.

FREE TO START. PRO IS AN OPTIONAL SUBSCRIPTION.
Free: start an arc and take your first habit through all 4 levels to Mastered, with streaks, reminders, the mood check and share cards.
Pro adds every habit after the first, rest days (one planned day off in any 7, and your streak waits), up to 2 extra reminders per habit, Insights, progress photos, build your own habit and categories, plus themes and app icons.

YOUR DATA
Sign-in is optional. Sign in with Apple, Google or email to back up your arc and pick it up on a new phone.

On iPhone and iPad. 13 languages. Light and dark mode. No ads.

Pick your 3 habits. KeyStone hands you each day's actions and grows them with you, level by level.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly Subscription | $29.99 | per year |
| 90 Day Arc Pass | $19.99 | per 3 months |
| Weekly Subscription | $2.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $59.99 | one-time |


## Is KeyStone safe?

Not enough ratings yet to assess KeyStone.

## Is KeyStone legit?

KeyStone: Winter Arc Habits appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for KeyStone is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 3.0.2 — 2026-11-06

• Fixed the error when starting your arc after reinstalling. If you're signed in, your saved arc now comes back on its own.
• Small fixes and improvements.

### 3.0.1 — 2026-11-05

• New ways to go Pro: a 90-day Arc Pass and a one-time Lifetime purchase.
• Small fixes and improvements.

### 3.0.0 — 2026-11-03

A whole new KeyStone: your 90-day Arc.
• Pick 3 habits and add more any time. One starts today; each next one joins after 10 straight days.
• Every habit climbs 4 levels. Miss a day and you fall back one step, never to zero.
• 40 habits, a daily mood check, share cards and account backup.
• Pro: build your own habit, insights, rest days, extra reminders, progress photos, themes and app icons.
• Now on iPad.

### 2.4.6 — 2026-08-24

• Smoother store-review experience on devices without the built-in rating sheet
• Small fixes and polish throughout

### 2.3.0 — 2026-08-19

• Tell us how the app is working for you — share feedback in one tap
• See the exact app version in Settings
• Pop-ups no longer overlap each other
• Small fixes and polish throughout

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All apps by TechSpells LLC: https://appshunter.io/developer/1809574785

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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 2026-11-09.*