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Put 2 to 5 apps side by side, from Google Play, the App Store, or both.
The leader in each row is highlighted.
Daily position in United States. Higher on the graph is better (rank 1 is the top).
None of these apps were in the top free chart in United States during this period. Try another country or chart.
Share of ratings at each star level. A big 1★ bar means many unhappy users.
Piston - OBD2 Car Scanner
★ 4.29 · 5,593 ratings
OBD Fusion (Car Diagnostics)
No rating · 3,240 ratings
How each app sells itself on the store, how it makes money, and what devices it needs.
New ratings per day is the best free sign of how many people are downloading right now: more new ratings means more new players.
Not enough daily data yet. The graph appears after the daily scraper has collected these apps on at least 2 days.
What each app changed, and when. Compare the dates with the rank graph to see what worked.
No changes found in this period.
Best position in each country's top charts. The 10 countries where these apps are strongest.
From each app's saved English reviews. The red cell is where an app gets the most complaints, which is your chance to do better.
Piston - OBD2 Car Scanner
Biggest complaint: pay to win, prices
“Now it's spying and wants money.”
OBD Fusion (Car Diagnostics)
Biggest complaint: pay to win, prices
“I purchased this car diagnostic program expecting it to include all the features I needed, as advertised.”
