The app uses dual-tasking, combining simple body movements with brain games, to challenge both the brain and body.
Palmerston North City councillor Bruno Petrenas took part in the trial.
Petrenas said he got great benefit from the NYMBL trial.
"As we get older, we think we're bulletproof," he says.
"Unfortunately, that's not the case as our cognitive skills wander off and away from our physical skills."
Petrenas visited his local hospital last week and was stunned to see the number of older people hospitalised with serious fall injuries from being knocked off e-bikes to tripping from playing table tennis.
He says the NYMBL challenge moves in a subtle way to bring together a person's cognitive skills with their physical skills.
"While the physical skills are basic and relatively easy when combined with cognitive challenges it clearly starts to show up the deficiencies we have," he says.
"And just as you become complacent, NYMBL provides a balance challenge that is definitely not easy.
"The NYMBL balance challenge is an excellent app for older people and can be undertaken daily in a short period of time."
Franklin, from Tararua, said she found it challenging.
"It certainly tests the ability to multi-task – it makes me wonder how men manage it."
She said she found the memory test the hardest.
"The maths is not so bad, thank goodness I grew up in an era where we were taught to add, subtract and multiply in our heads!"
Kirsten Malpas, ACC injury prevention leader, said NYMBL will help improve the balance of older New Zealanders.
"There is a perception that as you get older, falls and fractures become an almost inevitable part of life, and we want to challenge that, as many falls are preventable.
"By investing 10 minutes a day, a few times a week, in the comfort of your own home, you can improve your balance and maintain your independence and confidence."
ACC is funding the trial as part of their older people's programme Live Stronger for Longer, which is focused on preventing falls and fractures.
"Falls have a significant impact on a person's quality of life, especially if it results in a fracture, so we want to do what we can to prevent them from happening in the first place," says Malpas.
The NYMBL trial has already been a huge success.
Since it was released in August more than 11,000 people across New Zealand have registered for the app, with more than 92,000 balance training sessions completed.
The average age of NYMBL users in New Zealand is 70.
To register for NYMBL free, head to www.fallsfree.co.nz and answer a few questions about your current fitness level and goals.
• Live Stronger for Longer is a joint initiative between ACC, the Ministry of Health and Health Quality & Safety Commission New Zealand
