Comparison

Calculatrix vs Tango Event

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

Head to head
About

Calculatrix

Features
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Calculatrix 1.6.0 introduces a major feature update: โ€ข Brand New "Function Study" Mode: analyze any function f(x) with one tap. โ€ข Symbolic Derivative Calculation: view simplified and factored f'(x). โ€ข Automated Variations Table: visualize signs, monotonicity, and local extrema. โ€ข Comprehensive Mathematical Analysis: domain of definition, limits, and asymptotes (vertical, horizontal, and oblique). โ€ข Interactive Function Plotter: custom graphing window and adjustable study intervals. โ€ข Bilingual Support (English & French): toggle languages instantly right from the header. โ€ข Enhanced History: tap to reuse past expressions, swipe to delete, and live result previews. โ€ข Performance & Stability: fully updated and optimized for the latest iOS releases.

About

Tango Event

Features
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Tango Event helps your company organize events or training. Then helps company accumulate knowledge, manage training history, and continue extensive training after the event. How to operate: Enterprises / organizations have independent management accounts, set up and manage their own events. Information is kept confidential within your company. Main functions: - Company create events, list of nominated attendees, member ID, QR codes, invitation tickets. Or create public events, free entry. - Before the event: member have an invitation ticket, download documents, register a session of interest, Q&A with speakers / teachers. - Access control automatically by scanning QR code. - In the event: interact with speakers to scan by QR code when the speaker asks a question. - After the event: attendees gain access to documents, photos, interactive history, and continue to discuss course topics if required by the company / administrator. - This app helps your company and staff to accumulate knowledge according to each event and training course, help search and organize long-term training activities. - Paid contents are Private Events or Training Courses which users have to pay to attend. The costs is defined separately by the organizers, not defined by this application. This application does not have any payment features. - Individual customer has to contact to the organizers to buy Coupon Code for each Private Event of Training Course, and then input the Coupon Code on this app. - There is no fee to create an account with users who attend events or training courses. - Users can create an account through the Tango Event application or log in with a Google or Facebook account. - This app primarily is distributed in Vietnam.

Screenshots

Calculatrix4 screens
Tango Event4 screens

Verdict

The call

The clearest difference is ads: Tango Event at none against Calculatrix's shown. Tango Event also leads on update cadence (fortnightly vs every 8 months) and iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calculatrix ships an update every 8 months, Tango Event fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences ยท 3 level
Calculatrix versus Tango Event: the parameters behind the verdict, then further details
ParameterCalculatrixTango Event
PriceFreeFree
Update frequencyEvery 8 monthsFortnightly โ€” better
AdsYesNo โ€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 โ€” better
Further details โ€” not scored
Size21 MB57 MB
Age rating4+4+
DeveloperKangah Jacques N'GUESSANHUNGVIET TECHNOLOGY & INVESTMENT TRADING JOINT STOCK COMPANY

In-app purchases

None

Calculatrix

No in-app purchases

None

Tango Event

No in-app purchases

Questions

Is Calculatrix free?
Calculatrix is free to download, with no in-app purchases.
Is Tango Event free?
Tango Event is free to download, with no in-app purchases.
Do Calculatrix or Tango Event have ads?
Calculatrix shows ads; Tango Event does not.
Which is updated more often, Calculatrix or Tango Event?
Calculatrix ships an update every 8 months, and Tango Event fortnightly. Most recently, Calculatrix was updated on November 2, 2026 and Tango Event on November 3, 2026.

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