The best replacement for nanoflash is ki pro mini.

The best alternatives to nanoflash are rated as following:
★★★★★  ki pro mini
★★★  pix 240
★★  hyperdeck
★  kipro mini

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Speaking about nanoflash, one probably shouldn't forget about canon 5d.

Other search terms related to nanoflash and their ratings are:
★★★★★ canon 5d
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nanoflash
ki pro mini
pix 240