Android Memory Total / Guidelines ?

1. If I am aiming at Android devices with 512mb+, what is a reasonable memory budget to go for ? At the extreme, how much can you get away with before Android might jettison the app ?

2. Given that I have this target, how do I know if I am actually meeting it ? I have data from various sources that doesn't match up well, does anyone know which is the most accurate total ? (see below for the different attempts, which is the best/combination for a 'total' ?) :

   Using 'adb shell dumpsys meminfo' (132mb)

   133832 kB: Foreground 133832 kB: [process_name] (pid 26451)

   Using 'adb shell dumpsys meminfo [process_name]' (135mb)

                      Shared  Private     Heap     Heap     Heap
                   Pss    Dirty    Dirty     Size    Alloc     Free
                ------   ------   ------   ------   ------   ------
       Native       28       12       28   126876   123934     1881
       Dalvik     2591    16044     2204    13255    12635      620
       Cursor        0        0        0                           
       Ashmem        6       12        0                           
    Other dev        4       36        0                           
     .so mmap    10854     2572     2056                           
    .jar mmap        0        0        0                           
    .apk mmap       72        0        0                           
    .ttf mmap        0        0        0                           
    .dex mmap      128        0        0                           
   

   Other mmap 817 316 28
   Unknown 120577 536 120564
   TOTAL 135077 19528 124880 140131 136569 2501

Objects Views: 7 ViewRootImpl: 1 AppContexts: 2 Activities: 1 Assets: 3 AssetManagers: 3 Local Binders: 9 Proxy Binders: 15 Death Recipients: 0 OpenSSL Sockets: 0

SQL MEMORY_USED: 0 PAGECACHE_OVERFLOW: 0 MALLOC_SIZE: 0

Using custom written Unity code to get memory objects (115mb)

Time 11.69009 Frame 189 Level 0 Name L01_ MonoHeap 2.945313 MonoUsed 2.191406 System.GC.GetTotalMemory 2.191406 Profiler.usedHeapSize 89.23748 AllTextures 32.78072 All2DTextures 32.78072 AllAnims 26.68023 AllMeshes 45.41045 AllAudio 9.220627 AllMaterials 0.9634285 TotalResources 115.0555

Using Unity Profiler (89.4mb..115mb assets)

Total : 89.4mb Textures : 32.8mb Meshes : 45.8mb Materials : 1.0mb AnimationClips : 26.7mb AudioClips : 9.2mb

Same Level on iOS (170mb)

~170mb in the activity manager......

Confused...and grateful for any tips !