After Mint shut down, three apps started fighting for the same wallet: Monarch at $99/year, Copilot at $119/year, YNAB at $109/year. Every comparison I read lists features and calls it a day. None of them measured what these apps actually do to your money.
So I connected the same accounts to all three — checking, savings, two credit cards, one investment — and fed them an identical 90 days of spending. Then I tracked what actually matters: categorization accuracy, AI insight quality, and whether any app changed how I spend.
The most accurate one isn’t the one I’d recommend. Here’s what 847 transactions revealed.
The 40-second verdict (for people who hate suspense)
If you want the data later and the answer now:
Pick Monarch if you want hands-off tracking with the strongest out-of-the-box categorization. It quietly does its job and surfaces a clean net worth dashboard.
Pick Copilot if you’re on Apple, want the cleanest interface, and want AI insights you’ll remember on Tuesday. It’s the one that made me change a habit.
Pick YNAB if you have a real spending problem to solve. It’s not a tracker. It’s a guardrail with chores attached.
Same accounts. Same 90 days. Same 847 transactions through all three. Setup took a Saturday morning. The results took longer to reconcile — because the obvious winner kept losing on the metric that actually mattered.
Categorization accuracy: who got my spending right?
I manually verified every category for every transaction. The numbers:
| Tool | Out of box | After 30 days | Weekly cleanup |
|---|---|---|---|
| Monarch | 92% | 96% | ~3 min |
| Copilot | 87% | 94% | ~5 min |
| YNAB | 78% | 82% | ~12 min |
Monarch won on raw accuracy by a comfortable margin. Its rules engine is more aggressive about merchant pattern-matching, which means it catches edge cases on day one.
Copilot learns the fastest. The jump from 87% to 94% in three weeks was steeper than either competitor — the same pattern I saw comparing CodeRabbit, Greptile, and Codacy, where the tool that learns from your edits beats the one with the better starting accuracy.
YNAB’s 78% looks bad on paper. It’s mostly philosophical. YNAB assumes you’ll re-categorize anyway because the whole point is conscious assignment. Low accuracy is a feature, not a bug.
The surprise: Monarch missed every subscription renewal under $10. Copilot caught all of them and flagged $47/month in forgotten recurring charges I’d genuinely lost track of.
Monarch wins on accuracy. So why isn’t it the obvious pick?
AI insight quality: do they tell you anything useful?
Accuracy is table stakes. The real question is whether any of these apps tell you something about your money that you’ll actually act on.
I logged every AI-surfaced insight across the 90 days. A representative one from each:
Monarch: “Your dining spend is 14% above last month.” Accurate. Mildly useful. Forgotten by Tuesday.
Copilot: “You spent $340 on coffee shops in 90 days — that’s $1,360 annually.” Same data, completely different framing. The annual reframe stuck. I started making coffee at home three days a week.
YNAB: Doesn’t really do AI insights. It forces you to assign every dollar a job before you spend it. The friction is the insight — you can’t grow your coffee budget without watching your dining budget shrink.
Copilot’s Intelligence feature flagged four forgotten subscriptions worth $47/month combined — the same thing I saw testing Ramp vs Brex vs Expensify AI on the business expense side, where one tool caught 3 duplicate charges the others missed. Monarch caught two. YNAB caught zero — but YNAB users notice $47 leaving their budget the way I notice silent failures in LangSmith on a production app.
The pattern is clear. Monarch surfaces facts. Copilot surfaces reframes. The reframe sticks. The fact doesn’t.
But neither answers the harder question. Did any of these apps actually change my behavior?
Did any of them actually change how I spend?
This is the metric nobody measures. So I measured it.
I compared the 90 days before testing against the 90 days during. Same categories, same merchants, same income. Dining out was the cleanest signal to isolate.
Dining spend change, before vs during:
- YNAB: ↓ 31%
- Copilot: ↓ 9%
- Monarch: ↓ 4%
YNAB’s friction is the feature. Assigning every dollar a job before you spend it creates a pause moment — a tiny decision before every purchase. Monarch and Copilot are reporting tools. You check them after the damage. YNAB is a guardrail at the cliff.
The cost: YNAB needs roughly 25 minutes of active engagement per week. Monarch needs 5. Copilot lands at 10. So the trade is plain — AI does the work for you, but it doesn’t change your behavior. Manual work changes behavior, but the work itself is the bill.
If “best” means smartest, Monarch wins. If “best” means least friction, Copilot wins. If “best” means I will actually spend less money, only YNAB wins.
So when is the smarter AI actually the right pick?
Which Wins: Monarch vs Copilot vs YNAB
Stop asking which app is best. Ask which problem you’re solving.
Pick Monarch if: You want hands-off tracking with the strongest out-of-box accuracy. You share finances with a partner who needs view-only access. You care more about net worth dashboards than budgeting discipline. You’ve already controlled your spending and just want a clean rear-view mirror.
Pick Copilot if: You’re on Apple. You want the best-designed app of the three by a comfortable margin. You want AI insights that change how you think about specific categories. You hate spreadsheets but need the data to register somewhere.
Pick YNAB if: You have a real overspending problem. You’ve tried passive tracking and it didn’t help. You’re willing to trade 20 minutes a week for actual behavior change. You’d rather assign every dollar a job than watch a dashboard tell you the dollars are already gone.
The free option nobody mentions: most banks now have decent built-in categorization. If you only need tracking — not change — you might not need any of these. Same logic as picking the right LLM for the job: match the tool to the actual problem, not to the marketing.
The honest bottom line
Three apps. Same price range. Wildly different outcomes — and the most accurate one isn’t the one that changes the most behavior.
If I had to pick one for myself, I’d pay for Copilot. The annual reframe on coffee shop spending changed how I think more than YNAB’s friction ever did, and I value my Saturday mornings. If I had to recommend one to someone with genuine overspending, I’d say YNAB without hesitation. Every time.
The reframe to take with you: stop asking “which budgeting app is the best?” Start asking “which problem am I trying to solve?” Tracking, awareness, and behavior change aren’t the same job. The apps that win at one tend to lose at the others.
All three offer free trials — Monarch and Copilot at 7 days, YNAB at 34. Pick the one that matches your problem and run the full trial. None of these are worth $100+ a year on assumption.