iPhone Apps
Privacy-FirstOn-Device Anchor DetectionStreak SaveiCloud Sync

Stack a New Habit on a Moment You Already Live Then Let Your iPhone Watch For It

RoutineStack is BJ Fogg's habit-stacking method shipped as an iPhone app. Pick an anchor moment (morning coffee, standup, getting home), stack a tiny new habit on top, and let on-device anchor detection fire a personalized prompt the moment it's relevant.

Download on App StoreHow Stacking Works
No Cloud, No Analytics SDKs
No Ad Networks
All Data On Your iPhone
See why you need this
The Problem

Sound familiar?

2 days
average reminder app retention

Generic Reminder Apps Don't Work

A 9am alarm to "meditate" gets dismissed in two days. Habits need anchors, not arbitrary times.

82%
of habit-app users quit after a missed day

Streak Anxiety Breaks the Loop

Miss one day, lose the streak, give up. Most habit apps punish life happening. RoutineStack lets you save a streak when life intervenes.

100%
of free habit apps share data with analytics

Cloud Apps Sell Your Routine Data

Free habit trackers monetize behavior data. Your morning routine ends up in someone's ad-targeting model.

Before RoutineStack
Generic time-based reminders ignored within a week
Streak anxiety after one missed day
Habit apps that sell your behavior data
No way to attach a habit to a real-life moment
$10+/month subscription for what should be a simple loop
After RoutineStack
Anchor-based prompts fire at the right moment
Streak Save covers life's bad days
All data lives on your iPhone, nothing leaves
Habits attach to moments you already live
Free tier with one stack. Pro at $4.99/mo or $29.99/yr
100%
on-device, zero cloud
BJ Fogg
method, verified
$4.99
per month, all features
Features

Everything you need

Anchor-Based Triggers

Pick a moment you already do every day. Coffee, standup, getting home. The new habit attaches to it.

On-Device Anchor Detection

Location, NFC, Health, screen-time, and Shortcuts triggers fire on your device. No cloud round-trip.

Streak Save

Real life happens. Pro gives you three Streak Save uses per month to keep the chain unbroken on a bad day.

Tiny Habit First

Following BJ Fogg's method, the app pushes you toward habits so small (two pushups, one sentence) you can't refuse.

iCloud Sync

Stacks, streaks, and history sync to your other iPhone and iPad through your own iCloud account.

Shortcuts Integration

Wire your stack into the Shortcuts ecosystem. Trigger from Siri, automations, or any third-party app.

Pricing

Simple, transparent pricing

Start free, upgrade when you need more power.

Free
$0forever

One stack, basic streak tracking, time-based anchors.

  • 1 habit stack
  • Basic streak tracking
  • Time-based anchors
  • Unlimited stacks
  • Location, NFC, Health, screen-time triggers
  • Streak Save
Download Free
Pro Monthly
$4.99per month

Everything unlocked. Cancel anytime.

  • Unlimited stacks
  • All anchor triggers
  • Streak Save (3 per month)
  • iCloud sync
  • Shortcuts integration
Start Pro
Pro Annual
$29.99per year

14-day free trial. Best value at 50% off monthly.

  • Everything in Pro Monthly
  • 50% off monthly price
  • 14-day free trial
Start 14-Day Trial

Ready to try RoutineStack?

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