Comparison

Eco Cat App vs Stremlau

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

Head to head
About

Eco Cat App

This app provides a comprehensive catalog of over 20,000 catalytic converters, allowing users to look up their value by car brand or manufacturer. It offers accurate appraisals based on precious metal content analysis and helps sellers negotiate fair deals.

Highlights
  • Catalytic converter price catalog
  • Search by car brand
  • Search by manufacturer
  • Precious metal content analysis
  • Scrap cat appraisals
  • Fair deal negotiation
Features
Read full description

Ecotrade Group is a leading authorized purchaser of scrap catalytic converters and over the last 15 years has built up a huge database of knowledge from which the company has developed a comprehensive catalogue that lists more than 20000 items and increasing almost daily. This online catalytic converter price book comes pictures and you can conveniently look up the value of your spent catalytic converters either by car brand or catalytic converter manufacturers. Being at the forefront of the catalyst recycling industry, we commit to provide you with the most complete and comprehensive catalytic converter catalog prices updated 3 times per day to reflect market prices. Ecotrade has invested heavily in cutting edge technology that is designed, in conjunction with laboratory analysis, to precisely measure, to an extremely high level of accuracy, the precious metal content in any single used catalytic converter. Our custom-designed fully equipped laboratories can quickly and efficiently carry out materials analysis, using several methods including X-Ray Fluorescence (XRF) testing. In scrap catalytic converter transactions, the relationship between buyers and sellers is fundamentally unbalanced. Buyers invariably have all the power; thus, for sellers, it means selling their used catalysts can be an unpleasant process. By providing quick and easy scrap cat appraisals that quickly let sellers know whether they’re getting a fair deal or not, Ecotrade Group levels the playing field and improves sellers’ negotiating positions. Also, depending on your location in the world, if you want to sell your catalytic converters, our experienced and conscientious purchasers can personally visit premises to sort and assess the worth of your material. Buy and sell you scrap catalytic converters with Ecotrade Group ! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stremlau

Features
Read full description

Handwerker-App für Mitarbeiter und Kunden Abnahmen Arbeitspläne Bautagebuch Baustellen-Chat Eigene, individuelle Formulare Kapazitätsplanung Lagerverwaltung Leistungsverzeichnis Materialbestellung Materialverbrauch Rapporte Urlaubsanträge Unternehmensnews Zeiterfassung

Screenshots

Eco Cat App4 screens
Stremlau4 screens

Verdict

The call

The clearest difference is in-app purchases: Stremlau at none against Eco Cat App's 5. Eco Cat App's advantage is update cadence (fortnightly vs every 6 weeks). On price, ads, 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. Eco Cat App sells 5 in-app purchases, starting at $24.99 per month. Stremlau asks for nothing beyond the download.

UpkeepUpdate frequency

Eco Cat App ships an update fortnightly, Stremlau every 6 weeks. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
Eco Cat App versus Stremlau: the parameters behind the verdict, then further details
ParameterEco Cat AppStremlau
PriceFreeFree
Rating4.7 (2K ratings) — better—
Positive reviews88.0% of reviews—
Number of ratings2K — better—
Update frequencyFortnightly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size92 MB130 MB
Age rating4+4+
DeveloperEcotrade Tech Company LimitedMarco Heine

Bugs and requests

Eco Cat App

Reported bugs

2 issues
  • Login issues and account verification problems
  • Occasional app crashes or freezes

Requested features

4 requests
  • More free search credits
  • Ability to save favorite models
  • Integration with scrap buyer platforms
  • Localized pricing for different regions

Stremlau

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Eco Cat App

Subscriptions4
  • Gold - Monthly$24.991 Month
  • Platinum - Monthly$28.901 Month
  • Gold - Yearly$219.991 Year
Show 1 more
  • Platinum - Yearly$289.001 Year
One-time1
  • Pass searches$12.99
None

Stremlau

No in-app purchases

Questions

Is Eco Cat App free?
Eco Cat App is free to download, with in-app purchases available.
Is Stremlau free?
Stremlau is free to download, with no in-app purchases.
Do Eco Cat App or Stremlau have ads?
Neither Eco Cat App nor Stremlau shows ads.
Which is updated more often, Eco Cat App or Stremlau?
Eco Cat App ships an update fortnightly, and Stremlau every 6 weeks. Most recently, Eco Cat App was updated on October 29, 2026 and Stremlau on October 7, 2026.

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