Zero-rated app jumps to #31 on Mexico's Finance Top Grossing: the Fiados ranking is real, the business isn't

Fiados, a tab-book app built by one developer in Mexico, launched in Oct 19 and reached #31 in the Finance category on the Mexico App Store's Top Grossing chart by Nov 6, with a rating of 0. It looks like a small tool suddenly making money. A closer look says otherwise: this chart's bar is low enough that a few one-time purchases can push an app up. This piece covers what it is, how the ranking came about, how crowded this category is, and what you can take from it.

Tuesday on tab, paid back Saturday

The corner stores of Mexico (tiendita, abarrotes) have always kept a notebook of who took "2 sodas and bread" and hasn't paid yet. In 2025 July, Cuauhtémoc Rivera, president of the small merchants' alliance ANPEC, told the press that 44.4% of their surveyed shopkeepers said more people were asking for credit: "Wages don't last to the weekend, so people buy on credit from Tuesday to Saturday and pay when the weekend money comes in."

Fiados aims to replace that notebook. The developer is Alexy Omar Cruz Aguilera, and the package prefix is com.artezia. In the same month he also shipped two other small tools: 10-12's budget app "Mi Mes en Orden" and 10-18's quote-receipt app "Folio". By 11-06 all three had only 0 ratings (per the App Store developer page).

What it is

The store page is blunt: open a customer, tap "credit" or "payment," enter the amount, done. The home screen shows the total owed, customers are sorted by how much they owe, and under each name is how long since their last payment. Partial payments are netted automatically, and overpayments are recorded as a balance in the customer's favor.

The most locally flavored feature is called "cobra sin pena por WhatsApp" (collect without awkwardness): one tap opens WhatsApp with a polite pre-written message containing the customer's name and balance, which you review before sending. Other points: no sign-up, no ads, data stored only on the phone, and it states plainly that there is no interest and no late fees. The whole package is 0.9 MB, in Spanish and English.

The free version tracks up to 10 customers. The full version adds unlimited customers, PDF statements for customers, and monthly summaries, priced at MXN $49/month, $299/year, or a one-time $499 purchase (about $27 USD).

Why it charted: not a breakout, just a low bar

Its path on Mexico's Finance Top Grossing went like this: 11-01 #139, 11-02 #169, 11-03 #199,11-04, then 11-05 dropped off the chart, and 11-06 suddenly returned to #31. Over those five days the rating count stayed at 0 and the version stayed at 1.0.

Ranked 11-06 places above it at #27 to #30 are Nola with just 16 ratings, Alba AI with 3 ratings, and Goodbudget with 36 ratings. It sits around #30 on the Mexico finance Top Grossing chart, and a few dozen dollars a day in in-app purchases is enough to hold that spot. Its rank drifts down, drops out for two days, then jumps back, which most likely means a handful of sporadic payments: one landed at the end of October and slid off the chart, and around 11-05 someone bought a $299 yearly plan or a $499 one-time purchase (inferred).

So the ranking shows that some people will pay $20 to $30 for a tab book. It doesn't show that the app has many users.

Where users come from: no visible activity

• App Store search: the name and subtitle are the search terms themselves, "Fiados" and "Libreta de Deudas" (debt notebook). This is probably the only channel, but with 0 ratings you can't tell the volume.
• Searching the name on TikTok, X, and the web each returns 0 results. There's no website, and the privacy policy is a Google Doc.
• Ads: none found, but not finding them doesn't mean none were bought.

This is a product that has just been put on the shelf and hasn't started selling. One person shipping three tools in a month looks like a strategy of launching several and seeing which one gets bought.

Who it competes with: this category is already crowded

"Latin American tab books" is anything but a niche. What's niche is Fiados itself.

(App Store and Google Play figures are as of 11-06.)

Fiados' selling points are narrowness and lightness: no account, no ads, local storage, pre-written reminder messages, and a one-time purchase option. But WhatsApp reminders and no-account setups are already offered by Libreta Simple, Clarito, and Abona. These aren't a moat, and they aren't why it charted.

One more thing to keep in mind: Treinta has 12M installs on Play, but only a thousand or two ratings on iOS. Latin American shopkeepers mostly use Android, so an iOS-only tab book is structurally unable to reach most of them (inference).

What you can take away

1. On Mexico, Peru, and Chile's Finance Top Grossing charts, a few one-time purchases can put you in the top 50. Peru's Cobranza Pro, with 0 ratings, once reached #6 in Finance. It's a cheap way to test whether people will pay, but don't mistake the ranking for scale.
2. Put the paywall on customer count, with the limit at 10. People who just track things for fun never hit the limit. Shopkeepers running a real business do within a week or two, and that moment is exactly when they depend on the notebook most.
3. Offer both a one-time purchase and a subscription. Small shopkeepers don't like subscriptions. A one-time $499 is an easier decision than $49 a month.
4. Ship three small tools a month, name them after store search terms, and bet on whichever one gets paid for first.

If it were you

Verdict: C. There's something to learn, but building another tab book to copy Fiados isn't worth it. Fiados itself hasn't broken out. It charted because the ranking bar is low, not because demand is surging around it. And where the demand actually sits is already held by funded full-stack tools like Treinta and Kyte, plus a dozen copycat small apps.

Who it's for: people already building tools for Latin American small merchants who have an Android channel or offline distribution; or indie developers who want to test willingness to pay cheaply on low-bar charts and launch several small tools at once.

Who it's not for: people hoping to get traction by building "one more nicer-looking iOS tab-keeping app." The feature takes a week to build, and so does everyone else's. What's left to fight over is acquisition.

How to do it: if you really want into this niche, don't build an iOS-only single product. Make an Android-first version that works offline and can send statements over WhatsApp, with the paywall copying the per-customer limit and also offering a one-time purchase. Or switch to a country and language where the tab-keeping category isn't crowded yet, like small Central American countries, or the Philippines' sari-sari stores (they call it "utang").

How to acquire users: store search is just the floor. The real volume is offline and on WhatsApp. Wholesalers and beverage and snack delivery drivers visit these shops every day. Partner with them for referrals, or put a download link in every payment-reminder message so the person being chased also sees the app.

When to move: no rush. This niche won't disappear and there's no window closing. But if you plan to test willingness to pay by exploiting the low bar on small-country finance charts, the sooner the better. Once a few players start buying traffic, the bar goes up.

What would show I've misread it: if Fiados stays in the top 50 of Mexico's finance Top Grossing for the next month and its ratings climb into the dozens or hundreds, that would show a simple iOS tab-keeping app (credit only, no account, one-time purchase) can survive next to the big players. Then it's worth a second look, at least a B.