Comparison

100 Envelope Challenge vs Plump

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

100 Envelope Challenge

This app gamifies saving money by letting you track progress on various savings challenges, like the 100 Envelope Challenge. It offers visual feedback and customizable options to keep you motivated. Unlock all features with a one-time purchase.

Highlights
  • Gamified savings progress visualization
  • Customizable challenge rules
  • Multiple savings challenge types
  • Streak tracking and motivation tools
  • Home Screen widget for goal visibility
  • Optional daily reminders
Features
Read full description

Save $5,050 in 100 days — and actually enjoy doing it. The 100 Envelope Challenge is the savings method taking over TikTok, now a beautiful app for your iPhone. Number your envelopes 1 to 100, draw one each day, and stuff in that amount of cash. Fill all 100 and you've saved $5,050 — one small, satisfying step at a time. No bank linking. No account. Just you, your envelopes, and a wall that turns green as your savings grow. 【Saving that feels like a game】 Draw an envelope, flip it open, and watch the confetti fly. Every envelope you stuff turns green on your wall, your progress ring climbs, and your total ticks up — a little hit of motivation every single day. 【Play at your own pace】 Draw a random envelope or pick any one yourself. Save one a day, several at once, or catch up after a busy week. Stuffed a little more or less than the envelope said? Adjust the amount. It's your challenge, your rules. 【Stay motivated to the finish】 Track your current and longest streaks, see your savings curve climb over time, and get a projected finish date based on your real pace. An optional daily reminder keeps your streak alive, and a Home Screen widget keeps your goal in sight. 【More than one way to save】 Beyond the classic 100 Envelope Challenge, take on the 52-Week Challenge, the Penny Challenge, a Double It run, or build a fully custom challenge with your own amounts and length. 【Pay once. No subscription.】 Envelope100 is free to start. Unlock every challenge, remove ads, and run multiple challenges at once with a single one-time purchase — no subscriptions, no recurring charges, ever. Start your first envelope today and watch $5,050 add up faster than you'd think. 【Terms of Use (EULA)】 https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Plump

Features
Read full description

Saving money is invisible and boring — that's why it never sticks. Plump makes it something you can actually see. Plump is free to download and requires a paid subscription or lifetime unlock after onboarding to use the app. Pick a savings challenge, reveal your own little Plump mascot, and watch it grow rounder with every pound you save. The plumper your Plump, the closer you are to your goal. You keep the money yourself — in your bank, a pot, a jar, or real envelopes — and just log each save in the app. No bank connection. No linking. No lectures. Just you, your goal, and a very smug little creature cheering you on. PICK YOUR CHALLENGE - 100 Envelopes — the classic £5,050 challenge - 52 Weeks — save a little more each week - Penny 365 — start with just 1p a day - No-Spend — turn skipped spends into savings - Custom — any goal, any pace, sinking funds welcome EVERY DAY, AN EASY WIN Plump hands you one small save to log — little enough to do now, satisfying enough to keep your streak alive. WHAT MAKES PLUMP DIFFERENT - A mascot that plumps up as your savings grow - Shareable progress cards to keep you motivated - Streaks, milestones, and gentle daily nudges - Run several goals at once — holiday, emergency fund, Christmas - Cosy, simple, and never naggy Plump is a visual savings-challenge tracker for money you manage yourself. It does not connect to your bank, hold or move your money, invest, or provide financial advice. Start your first challenge — and watch your Plump grow. PAID ACCESS, SUBSCRIPTIONS AND TERMS Plump is free to download. Paid access is required after onboarding to use the app. At the paywall, you can choose a monthly subscription, annual subscription, or one-time lifetime unlock through Apple in-app purchases. Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel subscriptions in your Apple ID account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vQzXNr50T8jjdN3oYoszMwBshdex7y3PSh0a3p7tE6zEKG5Jb4k8dEmXLeVYYdr2T3bnqjJJIJQxQ5S/pub

Screenshots

100 Envelope Challenge4 screens
Plump4 screens

Verdict

The call

The clearest difference is ads: Plump at none against 100 Envelope Challenge's shown. Plump also leads on update cadence (every 9 days vs every 3 months) and iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 100 Envelope Challenge sells 1 one-off in-app purchase and Plump sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

100 Envelope Challenge ships an update every 3 months, Plump every 9 days. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

Scorecard3 real differences · 6 level
100 Envelope Challenge versus Plump: the parameters behind the verdict, then further details
Parameter100 Envelope ChallengePlump
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 9 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size11 MB38 MB
Age rating4+4+
DeveloperIkuhei KureThoughtSnap Labs Ltd

In-app purchases

1 purchases

100 Envelope Challenge

One-time1
  • Premium$4.99
3 purchases

Plump

Subscriptions2
  • Plump Monthly$6.991 Month
  • Plump Annual3 Days trial$29.991 Year
One-time1
  • Plump Lifetime$49.99

Questions

Is 100 Envelope Challenge free?
100 Envelope Challenge is free to download, with in-app purchases available.
Is Plump free?
Plump is free to download, with in-app purchases available.
Do 100 Envelope Challenge or Plump have ads?
100 Envelope Challenge shows ads; Plump does not.
Which is updated more often, 100 Envelope Challenge or Plump?
100 Envelope Challenge ships an update every 3 months, and Plump every 9 days. Most recently, 100 Envelope Challenge was updated on September 22, 2026 and Plump on September 10, 2026.

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