Comparison

Erchang Fish vs Rentadmin

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

Head to head

Erchang Fish

Dual frequency fish finder

About

Erchang Fish

This intelligent fish detector app offers a dual-band sonar system with a user-friendly interface. It's designed to be a helpful tool for fishing enthusiasts, providing convenient operation for better angling experiences.

Highlights

Dual band intelligent fish detection
Friendly interface
Convenient operation
Fishing helper tool

Features

Read full description

This is a dual band intelligent fish detector app with friendly interface and convenient operation. It is a good helper for fishing lovers.

About

Rentadmin

Features

Read full description

Funkcjonalności: * przegląd kalendarza rezerwacji, * program do wypożyczalni - sprawdza się w zarządzaniu wynajmem kajaków, rowerów, quadów, samochodów, kortów tenisowych, sal konferencyjnych czy parkingów, * obsługa cyklicznie organizowanych wydarzeń jak spływy kajakowe czy wycieczki rowerowe.

Screenshots

Erchang Fish4 screens

Rentadmin4 screens

Verdict

The call

The clearest difference is update cadence: Rentadmin at every 3 weeks against Erchang Fish's every 7 months. Erchang Fish's advantage is iOS requirement (9.3 vs 15.6). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Erchang Fish ships an update every 7 months, Rentadmin every 3 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 6 level

Erchang Fish versus Rentadmin: the parameters behind the verdict, then further details
Parameter	Erchang Fish	Rentadmin
Price	Free	Free
Positive reviews	33.3% of reviews	—
Update frequency	Every 7 months	Every 3 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	9.3 — better	15.6
Further details — not scored
Size	68 MB	20 MB
Age rating	4+	4+
Developer	定敢刘	Polcern Sp. z o.o.

In-app purchases

None

Erchang Fish

No in-app purchases

None

Rentadmin

No in-app purchases

Questions

Is Erchang Fish free?

Erchang Fish is free to download, with no in-app purchases.

Is Rentadmin free?

Rentadmin is free to download, with no in-app purchases.

Do Erchang Fish or Rentadmin have ads?

Neither Erchang Fish nor Rentadmin shows ads.

Which is updated more often, Erchang Fish or Rentadmin?

Erchang Fish ships an update every 7 months, and Rentadmin every 3 weeks. Most recently, Erchang Fish was updated on October 14, 2026 and Rentadmin on October 11, 2026.