Comparison

COM vs Portuguese Language Learning

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

Head to head
About

COM

Features
Read full description

COM simulates experiments with isolated mitochondria in an incubation chamber fitted with an oxygen electrode (oxygraph). Add mitochondria, substrates, ADP, inhibitors and uncouplers one after another and follow, in real time, O₂ consumption and the electrical potential of the inner membrane (Δψ). The challenge is to find out what each compound does: which ones stimulate oxygen consumption, which ones inhibit it, where each electron transport chain inhibitor acts and how uncouplers separate respiration from ATP synthesis. • 15 compounds: malate, pyruvate, α-ketoglutarate, succinate, TMPD + ascorbate, ADP + phosphate, rotenone, malonate, antimycin A, cyanide, carbon monoxide, oligomycin, 2,4-dinitrophenol and FCCP • Recording of dissolved O₂ and Δψ, with a numbered history of every addition • Several experiments side by side for comparison • Question guide for undergraduate classes and an answer table for teachers • Portuguese, English and Spanish Current version of the COM simulator, created in 1997 at the Educational Technology Laboratory (LTE), Institute of Biology, University of Campinas (Unicamp), and used in biochemistry courses ever since. Part of BIOQUÍMICA +30. Free, no ads, no sign-up and no data collection. Works offline.

About

Portuguese Language Learning

Learn Portuguese through engaging games covering reading, writing, and pronunciation. Access thousands of words and phrases categorized into 100 topics for real-world situations. Features smart games to improve all language skills.

Highlights
  • Learn reading, writing, and pronunciation
  • Thousands of words and phrases
  • 100 topics for real-world situations
  • Smart games for skill improvement
  • Multilingual interface
  • Progress tracking for correct/wrong answers
Features
Read full description

This app will help you learn to read, write, and pronounce words and phrases. It's a fun and easy-to-use educational game that includes thousands of words and phrases that provide you with knowledge in real-world situations. The app is categorized into 100 topics, covering aspects of daily life and travel situations. Why this application? - Teach you all the words and phrases that really matter. - It consists of smart games that improve your speaking, reading, listening, and writing skills. - It can count the correct and wrong answers for each educational game. - Multilingual interface (100). Application contents - Nouns and verbs. - Adjectives and antonyms. - Names of body parts. - Animal and birds. - Fruits and vegetables. - Clothes and accessories. - Communications and technology. - Devices and tools. - Education and sports. - Entertainment and media. - Feelings and experience. - Health and exercise. - House and Kitchen. - Places and buildings. - Travel and transportation. - Work and job. - Days and months. - Shapes and colors. - Accommodations and general expressions. - Difficulties in making friends. - Location and greeting. - Emergency and health. - Entertainment and general questions. - Numbers and money. - Phone, internet, and mail. - Shopping and food. - Time and dates. - Travel and directions. Test - Listen to a word. - Writing characters. - Translate a phrase. - A missing word from a sentence. - Words order. - Memory exam. PLEASE NOTE You will need a subscription in order to get access to all of this app’s courses and features. Subscription options: - 1-month subscription for $US6.99 (or the equivalent in local currency), automatically renewed until canceled. - 6-months subscription for $US7.99 (or the equivalent in local currency), automatically renewed until canceled. - 12-months subscription for $US8.99 (or the equivalent in local currency), automatically renewed until canceled. Your subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current payment period. Your iTunes account will be automatically charged at the same price for renewal within the 24-hour period prior to the end of the current payment period unless you change your subscription preferences in your Account Settings. Payment will be charged to iTunes Account at confirmation of purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. You can manage your subscriptions through your Account Settings after purchase. When a subscription is canceled, access to the app’s courses and features will expire at the end of the current payment period. Privacy Policy: https://sites.google.com/view/hosy-academy/privacy-policy Terms of Service: https://sites.google.com/view/hosy-academy/terms-of-service Have questions or suggestions? Feel free to contact us at hosy.developer@gmail.com

Screenshots

COM4 screens
Portuguese Language Learning4 screens

Verdict

The call

The clearest difference is in-app purchases: COM at none against Portuguese Language Learning's 3. COM also leads on ads (none vs shown) and update cadence (every 3 months vs every 16 months). On price, device support 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. Portuguese Language Learning sells 3 in-app purchases, starting at $6.99 per month. COM asks for nothing beyond the download.

UpkeepUpdate frequency

COM ships an update every 3 months, Portuguese Language Learning every 16 months. The most recent releases landed on November 13, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 6 level
COM versus Portuguese Language Learning: the parameters behind the verdict, then further details
ParameterCOMPortuguese Language Learning
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 months — betterEvery 16 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS16.015 — better
Further details — not scored
Size2 MB50 MB
Age rating4+4+
DeveloperEduardo GalembeckImad Al-Zaidi.

In-app purchases

None

COM

No in-app purchases

3 purchases

Portuguese Language Learning

Subscriptions3
  • Unlock Features$6.991 Month
  • Unlock Features$7.996 Months
  • Unlock Features$8.991 Year

Questions

Is COM free?
COM is free to download, with no in-app purchases.
Is Portuguese Language Learning free?
Portuguese Language Learning is free to download, with in-app purchases available.
Do COM or Portuguese Language Learning have ads?
Portuguese Language Learning shows ads; COM does not.
Which is updated more often, COM or Portuguese Language Learning?
COM ships an update every 3 months, and Portuguese Language Learning every 16 months. Most recently, COM was updated on November 13, 2026 and Portuguese Language Learning on November 3, 2026.

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