This app doesn’t support Windows 10 S.
HEIC Image Viewer Lite - Batch Converter is a cool image viewer and converter.
It supports more than 170 formats of image.
The printing, saving as and batch-converting features need to upgrade to pro version which costs $2.99.

It has three features:
1.Open single image.
2.Open folder to preview the images in a gallery.
3.Batch convert images to a format as you want. Such as jpg, jpeg.

In addition, he has several advantages.

1. Print the image.
2. Rotate the image.
3. Zoom in or out.
4. Add images to your albums.
5. Delete image by click “delete” button.

The list of supported formats is as follows:
heic; svg; svgz; ttf; tiff; tif; tga; svgz; bmp; jpg;
jpeg; png; gif;jp2;ppm;nef;svg;arw;crw;bmp2;
threefr; threeg2; threegp; a;arw;avs; b; bgr; bgra;
bgro; bmp; bmp2; bmp3; c; cal; cals; canvas; caption; cin;
clip; cmyk; cmyka; cr2; crw; cur; cut; dcm; dcr; dcx;
dds; dfont; dib; dng; dpx; dxt1; dxt5; epdf; epi; eps;
epsf; epsi; ept; ept2; ept3; erf; fax; file; fits; fractal;
ftp; fts; g; g3; g4; gif; gif87; gradient; gray; graya;
group4; hald; hdr; heic; hrz; http; https; icb; ico;
icon; iiq; inline; ipl; j2c; j2k; jng; jnx; jp2; jpc; jpe;
jpeg; jpg; jpm; jps; jpt; k; k25; kdc; label; m; m2v;
mac; map; mask; mat; mef; miff;mng; mono; mpc;
mrw; msl; msvg; mtv; mvg; nef; nrw; null; o; orf; otb;
otf; pal; palm; pam; pango; pattern; pbm; pcd; pcds;
pcl; pct; pcx;pdfa; pef; pes; pfa; pfb; pfm; pgm; pgx;
picon; pict; pix; pjpeg; plasma; png; png00; png24;
png32; png48; png64; png8; pnm; ppm;ptif; pwp;
r; radialgradient; raf; ras; raw; rgb; rgba; rgbo; rgf;
rla; rle; rmf; rw2; scr; screenshot; sct; sfw; sgi; six;
sixel; sr2;stegano; sun; text; tga; tif; tiff; tiff64; tile;
tim; ttc; ttf; txt; uyvy; vda; vicar; vid; viff; vips; vst;
wbmp; wpg; x3f; xbm; xc; xcf; xpm; xv; y; ycbcr;
ycbcra; yuv;emf; exr; flif; wmf; webp