Regarding speed we have blog post with 
comparison https://osmand.net/blog/fast-routing. Difference between HH and 
A* are described in this documentation 
article 
https://osmand.net/docs/user/navigation/guidance/navigation-settings?_highlight=highway&_highlight=hier&current-os=android#development-settings

On Friday, 6 March 2026 at 12:39:24 UTC+2 ralph lumen wrote:

> could you eventually tell the practical differences between A*2-Phase, A* 
> classic, HH x Java and HH x C++?
>
> ralph lumen schrieb am Freitag, 6. März 2026 um 11:37:17 UTC+1:
>
>> thank you! I realized how fast even a long route is now calculated, very 
>> good indeed. but as it means that all maps out of maybe a dozen GB of data 
>> have to be renewed if you actually would only need some 100mb. hm, that 
>> maybe difficult without (w)lan ...
>>
>> how much slower is A*2?
>>
>> [email protected] schrieb am Freitag, 6. März 2026 um 08:51:49 UTC+1:
>>
>>> Hi! The new OsmAnd route calculation algorithm requires all maps to be 
>>> from the same date. This dialog may occasionally appear in error because 
>>> OsmAnd uses a straight-line analysis to evaluate the route. If you are 
>>> certain that all necessary maps are present and share the same date, open 
>>> the "Missing map" dialog and select "Use downloaded maps" to force the 
>>> application to use the existing data.
>>>
>>> If your maps have different dates and you prefer not to update them, you 
>>> must revert to the previous route calculation algorithm. To do this, enable 
>>> the "OsmAnd Development" plugin under Menu – Plugins. Then, navigate to 
>>> Menu – Settings – [Select Profile] – Navigation settings – Route parameters 
>>> – Development – Routing type, and select "A* 2-phase.
>>> On Thursday, 5 March 2026 at 12:04:55 UTC+2 ralph lumen wrote:
>>>
>>>> I have all the maps which I need to plan a trip on my phone, but osmand 
>>>> does not want to calculate the route without the newest maps. how to force 
>>>> it to accept the existing ones?
>>>
>>>

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