I own a maglula uplula and it works perfectly on my P-10c spare mags I bought for my P-07; in fact, the mag bodies are identical with the same neon red follower and the front cuts for the P-10 mag release. I'm in no way connected with the product other than I own one.
There is really no other simple mag loader that I've found to compete with the maglula.
Previously, mag loaders seem to have had a dubious reputation among pistol shooters.
Before the maglula mag loaders tended to come in two categories:
1- "Inexpensive" small mag loaders which would save your thumbs but were slow to use. These are good for getting the last round in a tight mag or if you have arthritis or have suffered a hand injury.
2 - Professional heavy duty mag loaders (some motorized) which saved your thumbs and were fast, but insanely expensive and not portable.
Honestly, the maglula just works better than any of the other compact portable mag loaders I've tried. I use it, not because it saves my thumbs (it does), but because it is genuinely faster that hand loading pistol cartridges in magazines.
If you shoot enough that saving time or your thumbs is an issue, than I would recommend you 'bite the bullet' and swing for a maglula. You could spend a bit less with 'cheaper' loaders but by the time you've tried them all out and found them lacking, you could have just bought the maglula all along and have spent less money.