Comparison

TOPO.app vs MJ Trainer

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

Head to head

About

TOPO.app

Read full description

Our TOPO product family is the only radar system that can offer axle detection along with length and speed measurement. Its recording and classification functions – including an additional microphone for pinpointing the position of the engine block – open up new dimensions in traffic data capture. Our devices can be used on roads inside and outside of urban areas. They can be integrated in a standard reflector post or installed on various pole systems.

About

MJ Trainer

Features

Read full description

It is a software to exercise exercise responsiveness, combined with exercise equipment, through Bluetooth connection, set up different exercise methods, so that the exercise becomes interesting and diverse, while exercising the user's reaction ability.

Screenshots

TOPO.app1 screens

MJ Trainer3 screens

Verdict

The call

The clearest difference is iOS requirement: MJ Trainer at 11.0 against TOPO.app's 16.6. On price, update cadence, ads and in-app purchases 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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

Scorecard1 real difference · 5 level

TOPO.app versus MJ Trainer: the parameters behind the verdict, then further details
Parameter	TOPO.app	MJ Trainer
Price	Free	Free
Update frequency	Every 2 months	Every 2 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	16.6	11.0 — better
Further details — not scored
Size	37 MB	13 MB
Age rating	4+	17+
Developer	RTB Elektronik	东莞市满佳电子科技有限公司

In-app purchases

None

TOPO.app

No in-app purchases

None

MJ Trainer

No in-app purchases

Questions

Is TOPO.app free?

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

Is MJ Trainer free?

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

Do TOPO.app or MJ Trainer have ads?

Neither TOPO.app nor MJ Trainer shows ads.

Which is updated more often, TOPO.app or MJ Trainer?

TOPO.app ships an update every 2 months, and MJ Trainer every 2 months. Most recently, TOPO.app was updated on October 7, 2026 and MJ Trainer on October 2, 2026.