R36S vs. R36H, R36 Pro, R36 Ultra & R40S: Every R36 Model Compared

Below is our master hardware comparison table across all five R36 handheld variants, a hands-on ergonomic breakdown of the vertical R36S against the horizontal R36H, and how to avoid overpaying for locked K36 and EmuELEC clone boards.

Every R36 Handheld Model at a Glance: Master Specs Comparison Table

All five R36 models run on the same Rockchip RK3326 chip, but only the standard 2Bluebox (2bluebox.com) R36S, the horizontal R36H, and the R40S Pro use genuine dual-slot ArkOS motherboards.

Shopping for a budget retro handheld online often feels like walking through a naming maze. A single search for R36 vs R36S pulls up dozens of listings. You will see the R36S, R36H, R36 Pro, R36 Ultra, R36 Max, and R40S Pro. Many marketplace listings even invent upgraded processors.

As documented in the Handhelds Wiki R36S Clones database, every R36 version splits into two hardware lineages. Use this quick reference sheet to tell each R36 model apart before comparing full specs:

The genuine lineage includes our verified R36S units at 2Bluebox, the horizontal R36H, and the R40S Pro. These units use a dual-slot RK3326 motherboard with two discrete DDR3L memory chips. They format storage into standard BOOT and EASYROMS partitions.

In contrast, the clone lineage includes the R36 Pro, R36 Ultra, and R36 Max. These devices use the Helegaly K36 or EmuELEC board architecture. They rely on rf3536k4ka.dtb or rk3326-evb-lp3-v12-linux.dtb device tree files. Flashing a standard R36S ArkOS 2.0 image on these clone boards causes an instant black screen.

Compare all five R36 models across screen ratio, storage slots, and firmware support in Table 1:

Table 1: Master Hardware & Firmware Comparison Across the R36 Handheld Family. "Tested on our unit" means we checked it on a device we own. "Manufacturer spec" means the maker states it and we haven't verified it ourselves. "Community reports" means players report it, and results can vary.

For a full breakdown of how our baseline vertical console handles 20+ classic systems, read our hands-on 2Bluebox R36S review.

R36S vs. R36H: Vertical Game Boy Nostalgia vs. Horizontal Grip

The R36S and R36H share identical RK3326 internals and 3.5-inch 4:3 screens, but the vertical 2Bluebox (2bluebox.com) R36S keeps the D-Pad in the primary thumb zone and includes a dedicated FN hotkey button.

When comparing R36S vs R36H, players examine the exact same internal computer inside two opposite ergonomic shells. According to the Handhelds Wiki R36H technical page, the R36H launched in late 2024. It packs the Rockchip RK3326 SoC, 1GB RAM, dual microSD slots, and a 3,000mAh battery into a landscape shell. It also uses the same 3.5-inch 640x480 (4:3) IPS display (Panel 4 / V5).

Because processor silicon and display resolution are identical, neither handheld wins on frame rate. Instead, your choice comes down to three physical trade-offs:

• Shoulder Buttons (R36H Advantage): On the horizontal R36H, L1/L2 and R1/R2 sit side by side (in-line) along the top edge. As noted in the Retro Handhelds R36H hands-on review, these inline triggers operate quietly. They feel more natural for index fingers than the flared rear triggers on the vertical R36S.
• D-Pad vs. Left Stick Placement (R36S Advantage): Unlike the Anbernic RG35XX H, the R36H uses an asymmetric layout. The left analog stick sits at the top, while the D-Pad is tucked into the lower-left corner. Around 90% of games on an RK3326 console are 2D titles (SNES, GBA, Genesis, PS1). Reaching down to the bottom corner of the R36H tires your left thumb quickly. The top-aligned D-Pad on the vertical R36S feels far more natural.
• The Missing FN Button (R36S Advantage): On our bench-tested R36S units, three buttons sit below the display: SELECT, FN, and START. The center FN key serves as your dedicated ArkOS 2.0 hotkey modifier. You press FN + START to quit, FN + R1 to save state, and FN + X for the Quick Menu. The horizontal R36H removes the FN button completely. It leaves only stiff, clicky START and SELECT buttons.

If you install the community AeolusUX ArkOS 2.0 (Panel 4 / V5) build on an R36H, you must manually remap the global hotkey modifier so the missing FN button does not trap you inside a game:

1. Boot Into EmulationStation and Open Options: Power on your console and scroll to the Options section on the main EmulationStation wheel. Press A to open the ArkOS hardware scripts menu.
2. Switch Device Type to R36H / R33S: Select Device Type (or the hotkey configuration script). Change the active profile from R36S to R36H / R33S, then press A to confirm.
3. Use Select as Your Global Hotkey Modifier: Once the console restarts, hold Select instead of FN for system shortcuts (Select + Start twice to quit, Select + X to open RetroArch). For the full shortcut map on standard consoles, view our R36S user manual and setup hub.

R36S vs. R40S & R36 Pro: Rounded Shell Reskins and the K36 Clone Trap

The vertical R40S Pro is a genuine R36S board inside an overpriced rounded shell, whereas the R36 Pro is a single-slot Helegaly K36 clone that cannot run standard R36S ArkOS images.

Searching for R36S vs R40S on Amazon, TikTok Shop, or AliExpress brings up dozens of handhelds with rounded corners. Sellers market them as upgraded Pro editions. Behind that rounded plastic shell, three completely different machines share similar names:

• R40S Pro (Vertical Rounded Shell: Genuine R36S Board at a Markup): According to the Handhelds Wiki R40S Pro hardware page, the vertical R40S Pro is a standard R36S motherboard inside a rounded shell. It packs the same RK3326 chip, 1GB DDR3L RAM, 3.5" 640x480 4:3 display, dual microSD slots, and 3,000mAh battery. It runs standard R36S ArkOS 2.0 images cleanly. However, online sellers routinely mark it up to $85-$100. Some batches even carry an "R40S POR" typo on the rear sticker.
• R40S Non-Pro (Horizontal 4.0" 1:1 RGB30 Clone): Do not confuse the vertical R40S Pro with the horizontal R40S. The horizontal R40S (~$70) uses a 4.0-inch 720x720 square screen. In independent tests, it suffered from severe false diagonals because its D-Pad lacked a center pivot point.
• R36 Pro (Vertical Rounded Shell: Single-Slot K36 Clone): The R36 Pro also features a rounded bottom and advertises a 4,000mAh battery. However, the Handhelds Wiki R36PRO specification page confirms it is made by Helegaly, the manufacturer behind the K36 clone. You can spot an R36 Pro by its round soccer-ball speaker grille and its single microSD slot. Because it relies on rf3536k4ka.dtb, standard R36S ArkOS cards fail to boot. Owners must run the ArkOS-K36 clone fork, losing clean two-card storage separation.

R36S vs. R36 Ultra: 3.5" 4:3 ArkOS vs. 4.0" 1:1 Square Screen EmuELEC

The R36 Ultra trades the native 4:3 screen and ArkOS support of the 2Bluebox (2bluebox.com) R36S for a 4.0-inch 1:1 square display running stock EmuELEC that forces heavy black bars on PS1, N64, and SNES games.

Comparing R36S vs R36 Ultra pits a classic 3.5-inch 4:3 (640x480) display against modern 4.0-inch 1:1 (720x720) square screens. This square lineup includes the R36 Ultra, R36 Max, and R36 Plus.

While a 4.0-inch panel sounds bigger on paper, pairing a 1:1 square screen and clone firmware with the Rockchip RK3326 processor creates three real-world drawbacks:

1. Thick Black Bars (or Stretched Art) on 4:3 and 16:9 Consoles: Nearly every home console from the 1980s through 2000 was built for a 4:3 aspect ratio (NES, SNES, Genesis, PS1, N64, Dreamcast). The Sony PSP uses 16:9 widescreen. On the 1:1 screen of the R36 Ultra, 4:3 games display thick black letterboxing bars on top and bottom. This shrinks the active image back down to ~3.5 inches. Stretching the picture distorts character proportions. A 1:1 screen only benefits Game Boy, Game Boy Color, PICO-8, and vertical arcade titles.
2. 68.75% Higher Pixel Load on the Same Mali-G31 GPU: The 640x480 panel on the R36S renders 307,200 pixels per frame. In contrast, the 720x720 screen on the R36 Ultra pushes 518,400 pixels. Driving 68.75% more pixels on the exact same RK3326 chip strains the GPU. It leaves zero extra headroom for demanding 3D emulators. You can review our benchmarks in our R36S vs. R36Max comparison and our R36S PSP settings guide.
3. Stock EmuELEC Frontend & Rattling Battery Cover: As verified in the Retro Handhelds R36 Ultra review, the R36 Ultra ships with custom Linux running an EmuELEC frontend on an RK3326 clone board. It also features a rear battery door that rattles during gameplay. While the R36 Plus retains ArkOS R3XS support and built-in Wi-Fi, both the R36 Ultra and R36 Max use EmuELEC clone boards.

Verdict: Why the Standard R36S Remains the Safest Buy in 2026

The standard vertical 2Bluebox (2bluebox.com) R36S ($79.99) remains the safest buy in 2026 thanks to its native 4:3 IPS display, physical FN hotkey button, dual microSD slots, and 100% compatibility with community ArkOS 2.0 updates.

When we bench-test R36S consoles at 2Bluebox LLC before shipping, we inspect three hardware checkpoints. We verify a genuine Dual-RAM Rockchip RK3326 (1GB DDR3L) mainboard. Next, we verify a clean BOOT partition with rk3326-r35s-linux.dtb panel files alongside the EASYROMS partition. Finally, we confirm responsive FN hotkey switching inside ArkOS 2.0.

Whether you are buying your first pocket emulator or upgrading from a locked clone, the original vertical 2Bluebox R36S Handheld ($79.99) wins on long-term reliability:

• 10x Larger Community Firmware Ecosystem: Every major release for AeolusUX ArkOS 2.0, AmberELEC, ROCKNIX, and standalone PortMaster PC ports targets the standard R36S first. Guides and fixes are everywhere online.
• True Dual-Card Isolation (TF1-OS + TF2-GAME) & Full FN Controls: Unlike the single-slot R36 Pro or the R36H, the standard R36S keeps the OS on TF1 and your ROMs on TF2. You also get dedicated FN hotkeys for quick save states.
• Zero Clone Markups: You get native 4:3 display scaling across 15,768 preloaded games without paying inflated prices for reskinned shells. Browse all colors in our R36S Handheld Game Console collection or compare our full lineup below:

Frequently Asked Questions (FAQ)

Conclusion

Navigating the crowded R36 handheld family is simple once you look past outer plastic shells. Because every model shares the Rockchip RK3326 processor, paying extra for an R40S Pro, R36 Pro, or R36 Ultra yields zero extra gaming speed. Pick the horizontal R36H only if you prefer a landscape grip and do not mind remapping hotkeys to Select. Otherwise, choose the bench-tested 2Bluebox R36S ($79.99) for native 4:3 scaling, a dedicated FN key, dual microSD slots, and full community ArkOS 2.0 support.

Skip the single-slot clone lottery, stick with genuine dual-card ArkOS hardware, and Press Start.

Further Reading & Resources

• R36H hardware & missing FN key fix: R36H Technical Specifications, Panel 4 DTB & ArkOS Hotkey Guide (Handhelds Wiki)
• R36H ergonomics & button layout test: R36H Hands-On Review: Horizontal Budget Handheld Analysis (Retro Handhelds)
• R40S Pro vs. R36 Pro hardware teardown: R40S Pro & Helegaly R36PRO Specification Database (Handhelds Wiki)
• R36 Ultra square screen & EmuELEC OS review: R36 Ultra Review: 4-Inch 1:1 RK3326 Clone Evaluation (Retro Handhelds)
• Identifying genuine ArkOS boards vs. clones: R36S EmuELEC & K36 Clones Identification Guide (Handhelds Wiki)