100 Envelope Challenge — Save $5,050 in 100 Days

The Idea

The 100 Envelope Challenge is the viral savings method you've seen everywhere: label one hundred envelopes from $1 to $100, pick one at random each day, and put that amount of cash inside. Finish all hundred and you've saved $5,050 — without ever feeling like you were budgeting.

This app is your digital envelope wall. It keeps the thrill of the random draw — the flip, the reveal, the little burst of confetti — while quietly tracking every dollar, your streak, and how close you are to the finish line.

No bank connection, no account, no spreadsheets. Just you and your envelopes.

How It Works

1Draw an envelope
Tap the draw button for a random envelope — or pick a specific number yourself. Feeling brave? Draw more than one a day. Catching up? Draw as many as you like.
2Flip and reveal
The envelope flips open to show the amount. Set that cash aside — in a real envelope, a jar, or a savings account.
3Mark it stuffed
Confirm you've saved it (adjust the amount if you need to — decimals welcome), or park it in the "save later" row and come back to it.
4Watch the wall turn green
Every stuffed envelope turns green on your 10×10 wall. The progress ring climbs, the streak grows, and $5,050 gets closer every day.

What's Inside

The envelope wall
A beautiful 10×10 grid of kraft envelopes. Sealed, waiting, or stuffed — you can read your whole journey at a glance.
Random or hand-picked draws
Let chance decide or choose your own number. Draw several in one day, skip a day and catch up later — the challenge bends to your life.
Flexible amounts
Stuffed a little more or less than the envelope said? Adjust the actual amount, decimals included. The totals stay honest.
Stats that motivate
Total saved, envelopes done, current and longest streaks, a savings chart, and a projected finish date based on your real pace.
More challenges
Beyond the classic: a 52 Week challenge, a Penny challenge, a Double It version ($2–$200, $10,100 total), or build your own with custom amounts.
Daily reminder
An optional gentle nudge at the time you choose, so the streak never slips your mind.
Home screen widget
Your progress ring, total saved, and streak — right on your home screen.
Sound & haptics
A satisfying flip and a coin-bright chime for every save — each can be turned off in Settings.
iPhone & iPad
Light, Dark, or System appearance. Everything stored on your device.

Questions

Do I have to draw exactly one envelope a day?

No — that's the point of this app. Draw one a day for the classic 100-day pace, draw several when you're motivated, or catch up after a quiet week. Your streak counts days you save, but nothing locks you out.

Where does my money go?

Nowhere — the app never touches your money. It's a tracker: you set the cash aside however you like (envelopes, a jar, a savings account), and the app keeps score.

What if I can't afford a big envelope today?

Draw a specific smaller number instead of a random one, or park a drawn envelope in "save later" and stuff it when you can. You can also adjust the actual amount saved.

Can I run a different challenge?

Yes. Premium unlocks the 52 Week challenge ($1,378), the Penny challenge, Double It ($10,100), and fully custom challenges — your envelope count, your amounts. You can even run several at once.

Does it support Dark Mode?

Yes — choose System, Light, or Dark in Settings.

Premium

The classic 100 Envelope Challenge is free, supported by ads. Premium is a single one-time purchase — pay once, yours forever. No subscription, no recurring charges.

Removes all ads.
Unlocks every challenge template — 52 Week, Penny, Double It.
Unlocks custom challenges with your own envelope count and amounts.
Run multiple challenges at the same time.

Payment is charged to your Apple ID at confirmation of purchase. Already bought it? Use Restore on the Premium screen to bring it back on any of your devices.

Privacy Policy

Your challenges, savings progress, streaks, and settings are stored locally on your device. No account or sign-in is required.
The app never connects to your bank and never handles real money.
The app shows ads through Google AdMob, which may use your device and advertising identifiers to serve and measure ads. You can limit ad personalization in your device settings.
Before any tracking across other companies' apps and websites for personalized advertising, the app asks your permission through Apple's App Tracking Transparency (ATT). You may allow or deny this, and change your choice anytime in Settings.
The optional daily reminder uses local notifications only — nothing leaves your device.
The app does not sell your personal data and does not track your location.

Terms of Service

You may use this app for personal, non-commercial purposes.
The app is a savings tracker for motivation and record-keeping; it does not provide financial advice.
You may not reverse engineer, modify, or redistribute the app.
Features may be changed or discontinued at any time.
The app is provided "as is," without warranties of any kind. We are not liable for any damages arising from its use.

Purchases are also governed by Apple's standard Terms of Use (EULA).

Contact & Support

Questions, ideas, or something not working? We'd genuinely like to hear from you.

Email — wuyuping38@gmail.com
We usually reply within 24–48 hours.