App, Excel, or WhatsApp: which is the best way to manage personal finances
If you search for a personal finance app, you’ll find thirty options in five minutes — and they all promise the same thing: full control, pretty charts, automatic categorization. The real decision isn’t which app is best in the abstract, but which of the three available approaches fits your life: Excel, traditional apps, or a WhatsApp assistant.
Each approach runs on a different operational logic, and that’s the part almost nobody compares. This article breaks down the three, with their real pros and cons, a comparison table, and an honest question at the end: which one will you actually be using 90 days from now?
The three approaches available in 2026
Despite the volume of products, there are only three ways to manage personal finances today:
- Spreadsheet (Excel, Google Sheets, Numbers).
- Traditional finance app (with or without bank connection).
- Conversational WhatsApp assistant.
Everything else is a variation of these three. A fourth approach — “not tracking finances” — technically exists, but it’s not an option if you’re reading this.
Approach 1 — Spreadsheet
The oldest tool is still the most flexible. Excel or Google Sheets let you build anything: from a basic log to sophisticated models with formulas, pivot tables, dashboards, and 10-year projections.
For:
- Total control over what you log and how you analyze it.
- Zero cost (Google Sheets) or low one-time cost (Excel).
- Full privacy: your data stays with you, not on someone else’s servers.
- You learn by building it: you understand your finances better because you designed the system.
- No dependence on a vendor that can raise prices or shut down.
Against:
- High logging friction. Open Excel, wait for it to load, scroll to the right row, type, save. Multiply by 50 transactions a month.
- Non-trivial learning curve. Formulas, validations, and pivot tables take time.
- Easy to break: an accidental change in a cell can tank the whole model.
- Hard on mobile. Typing amounts with a small keyboard, on the move, is miserable.
- Depends on pure discipline. Without automatic reminders, it gets forgotten.
Fits: people comfortable with Excel, office workers who already live in spreadsheets, folks who enjoy designing their own systems.
Doesn’t fit: people on the move all day, those who log from their phone, people who don’t live in Excel at work, anyone who values lower friction over more control.
Approach 2 — Traditional finance app
The market is crowded: Fintonic, Monefy, Wallet, Mint, YNAB, Wallet by BudgetBakers, Spendee, Money Manager. Most follow the same model: install the app, create an account, log expenses manually or connect your bank to import transactions.
For:
- Interface built for finance: categories, charts, goals, automatic reports.
- Some offer bank connections that import transactions effortlessly.
- Sync across devices.
- Advanced features: savings goals, alerts, shared budgets.
- Attractive visual reports.
Against:
- Adoption friction: another app to install, another account to create, another password to remember.
- The ones that work well usually cost ($5-15 USD a month).
- Bank connection tends to be fragile: many banks worldwide aren’t supported, or disconnect every couple of weeks.
- Manual capture is still tedious: open app, find category, type amount.
- Depends on the mental calendar of “remembering to open the app”. Without that, cash expenses vanish.
- Automatic categorization fails often with local merchants or ambiguous transfers.
- Usage drops dramatically after 30 days in most cases.
Fits: disciplined people with a habit of using daily apps, those whose banks are well-supported, people who enjoy the aesthetic of dashboards.
Doesn’t fit: people with “app fatigue”, folks who use a lot of cash, families where several members need to log.
Approach 3 — Conversational WhatsApp assistant
The newest approach, and the one that changes the friction equation. Instead of opening an app, you write to a contact on WhatsApp: “lunch was $28 with María”, or you send a photo of the receipt, or a voice note. The assistant interprets, categorizes, and logs.
For:
- Minimal friction: WhatsApp is already open on your phone all day, no new app to install.
- Accepts any format: text, voice, photo, PDF. Log the way you actually talk.
- No learning curve. If you can chat, you can use it.
- Naturally multi-user: each family member uses their own WhatsApp, all consolidated.
- No bank connection (and therefore no sharing of banking credentials).
- Logged at the moment of the expense, not at end of day when you’ve forgotten the exact amount.
- AI that learns your patterns: if you always shop at the same grocery store, it soon classifies without asking.
Against:
- Relatively new technology, fewer mature options than traditional apps.
- Quality depends on how good the AI model behind it is. Some assistants stumble on complex instructions.
- Visuals tend to be more basic than in apps with dedicated dashboards (though many complement with a web panel).
- Privacy depends on the provider: you have to trust how they handle your financial messages (same as any service, but worth flagging).
- Not every assistant handles every language or local slang well.
Fits: most people in 2026. Specifically: those glued to their phone, people who use a lot of cash, multi-user families, people with low friction tolerance, adults who won’t adopt yet another app.
Doesn’t fit: those who prefer dense visual interfaces (charts, long tables), people who need advanced financial modeling (projections, scenario variables), people fully opposed to using AI.
Comparison table
| Criteria | Excel | Traditional app | |
|---|---|---|---|
| Logging friction | High | Medium | Very low |
| Learning curve | High | Medium | None |
| Monthly cost | $0 | $5-15 USD | $5-12 USD |
| Logging from mobile | Hard | OK | Natural |
| Photo capture | No | Some | Yes |
| Voice capture | No | No | Yes |
| Multi-user | By sharing the file | Depends on plan | Native |
| Auto categorization | No | Partial | Yes (AI) |
| Data privacy | Full (local) | Depends | Depends |
| 90-day sustainability | Low | Medium | High |
| Works with cash | Yes (manual) | Yes (manual) | Yes (natural) |
The “90-day sustainability” column is the game changer. The theoretically best system is useless if you stop using it after 3 weeks.
Which to choose based on your profile
If you already use Excel at work and enjoy building systems: stick with Excel. Your learning curve is paid for and you control everything.
If you’re a freelancer or contractor who needs to separate personal from business: Excel or a WhatsApp assistant with “Business” categories configured. Traditional apps usually complicate the split.
If your family needs to see consolidated expenses and several members log: WhatsApp assistant. Traditional apps require everyone to install and learn; Excel requires someone to consolidate manually.
If you’re disciplined, love visual interfaces, and your bank is supported in apps like YNAB/Fintonic: a traditional app with a bank connection will work for you.
If you’ve tried apps before and always quit after 2 months: it’s not your lack of discipline, it’s the friction. Try WhatsApp.
If you use a lot of cash: run away from any solution with a bank connection. Cash doesn’t show up at the bank, and 40% of your spending would disappear. WhatsApp or Excel are your real options.
The honest question
Before you choose, answer one thing: which of these three systems are you actually going to use 90 days from now?
Not which one seems most powerful. Not which one looks more sophisticated. Not which one your finance-savvy friend recommended. Which one you’ll be using on July 20th, without it costing you a second thought.
The honest answer for most people in 2026 is the approach with the lowest friction. And that almost always means the one that lives where you already live: WhatsApp. That’s why we built Lukrio there. Not because the channel is great in itself, but because it’s the only one where friction doesn’t win.
If you want to go deeper on tracking expenses without Excel, see how to log receipts without Excel or the complete guide to managing personal finances.
Want to try the WhatsApp approach?
Lukrio is a finance assistant that lives in your WhatsApp. You write to it like any contact, it classifies your expenses, and shows you how your budgets are going in real time. Nothing to install, no banking credentials to share.
If this article helped, see also the 50/30/20 budget rule, how to categorize your expenses, and the most common budgeting mistakes.