Comparison

Regla de tres vs Contta

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

Head to head

Rule of Three

Split your checks

About

Regla de tres

Features

Read full description

Rule of three calculator.

About

Contta

Read full description

Contta is a check-splitting app, where you can split with your friends and family based on who ate what. You can use it for restaurant checks, bar tabs and even food delivery. Features: - Split the items from the photo of the check or add them yourself. - Adjust the currency and standard tip. - Add as many people as you want. - Share the split check. - Check out the history of old split checks. The paid version offers unlimited checks. Try our free trial. http://www.apple.com/legal/itunes/appstore/dev/stdeula

Screenshots

Regla de tres2 screens

Contta4 screens

Verdict

The call

The clearest difference is in-app purchases: Regla de tres at none against Contta's 3. Regla de tres also leads on device support (3 vs 1). Contta's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 19 months). On price and iOS requirement 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. Contta sells 3 in-app purchases, starting at $0.49 per month. Regla de tres asks for nothing beyond the download.

UpkeepUpdate frequency

Regla de tres ships an update every 19 months, Contta every 2 weeks. The most recent releases landed on September 17, 2026 and September 16, 2026 respectively.

Scorecard4 real differences · 2 level

Regla de tres versus Contta: the parameters behind the verdict, then further details
Parameter	Regla de tres	Contta
Price	Free	Free
Update frequency	Every 19 months	Every 2 weeks — better
Ads	Yes	No — better
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod — better	iPhone
Requires iOS	15.6 — better	16.0
Further details — not scored
Size	24 MB	32 MB
Age rating	4+	4+
Developer	Edwin Mejia	Moises Neto

In-app purchases

None

Regla de tres

No in-app purchases

3 purchases

Contta

Subscriptions2

Monthly$0.491 Month
Yearly$4.991 Year

One-time1

Lifetime$9.99

Questions

Is Regla de tres free?

Regla de tres is free to download, with no in-app purchases.

Is Contta free?

Contta is free to download, with in-app purchases available.

Do Regla de tres or Contta have ads?

Regla de tres shows ads; Contta does not.

Which is updated more often, Regla de tres or Contta?

Regla de tres ships an update every 19 months, and Contta every 2 weeks. Most recently, Regla de tres was updated on September 17, 2026 and Contta on September 16, 2026.