i don't know the developpers.
but my favorit app is OSM scout server.

juste a little subject for the french users.
to use mobile data, you have to change the APN from : mmsbouygtel.com to ebouygtel.com

Result for a
Sony Xperia X f5121
Ubuntu 16.04 (ota-25)
Use the buttons bellow to start a benchmark
(the results will be displayed after the benchmark
finished, this can take some time!).
Please do not turn off your device or switch to
other apps, when running the benchmark,
this will make the results of a benchmark useless.

The results of a new benchmark will be displayed
under the results of performed benchmarks.

Example results for the CPU Benchmark of a Nexus 4:
sysbench --test=cpu --num-threads=2 --cpu-max-prime=20000 run
57 events per second

Use the buttons below to get results
that can be used to compare
your device with other devices.

sysbench --test=cpu --num-threads=2 --cpu-max-prime=20000 run
1059 events per second

sysbench --test=cpu --num-threads=2 --cpu-max-prime=20000 run
909 events per second

sysbench --test=cpu --num-threads=8 --cpu-max-prime=20000 run
2684 events per second

sysbench --test=memory --num-threads=4 run
Operations performed: 104857600 (894135.77 ops/sec)
102400.00 MB transferred (873.18 MB/sec)

sysbench --test=mutex --num-threads=64 run
total time: 1.5173s