Soundcore A20i vs EarFun Free 2S
Which Budget Earbud Actually Wins?

Why I Put These Two Head-to-Head

You are standing in the digital aisle at midnight. Two tabs are open. One has the Soundcore A20i. The other shows the EarFun Free 2S. Both cost roughly the same. Both have solid ratings. You read three reviews, and none of them actually tell you which one to buy — they just list specs and call it a day.

I know that feeling. So I bought both, spent three weeks with them, and this Soundcore A20i vs EarFun Free 2S comparison is the answer I wish I had. I used them commuting, at the gym, on work calls, and watching content late at night. Neither is perfect. However, one is clearly a better match for most people — and I will tell you exactly which one by the end.

Both sit in the budget true wireless earbuds category under $40, and both punch well above their price. The real question is: which one punches harder for you?

Soundcore A20i

~$35 · Anker / Soundcore

VS

EarFun Free 2S

~$35 · EarFun

Full Specs Comparison — Soundcore A20i vs EarFun Free 2S

The specs are surprisingly close. Notably, the EarFun Free 2S wins on total battery, multipoint, and microphone setup. Meanwhile, the A20i wins on per-bud battery life and has the only app support of the two. That last point matters more than it looks on paper.

Sound Quality: Which Budget Earbud Actually Sounds Better?

Sound quality is where real differences show up — and where marketing claims often fall apart. I tested both with a mix of genres: hip-hop (Kendrick Lamar's HUMBLE), acoustic guitar (Tommy Emmanuel), a mid-heavy podcast episode, and electronic (Bicep). Here is what I found.

Soundcore A20i Sound — Warm Bass, Tuned for Everyday Listening

The A20i has a warm, bass-forward sound signature. Low frequencies are full and present without being muddy. When I played hip-hop, the kick drum and 808s felt satisfying — this is clearly tuned for popular music genres rather than analytical listening.

Mids are slightly recessed, which means vocals sit just behind the mix. Acoustic guitar and podcasts still sound natural, but voice frequencies lack a touch of presence. Treble is smooth rather than crisp — no harshness, though finer hi-hat detail is softened.

What changes the game: the Soundcore app's 10-band EQ. After about 10 minutes of tweaking, I dialed in a noticeably better sound for acoustic content. If you enjoy customizing your audio, this is a feature the EarFun simply cannot match.

🎧 My Sound Verdict — Soundcore A20i Default tuning favors bass lovers. With app EQ: genuinely excellent for the price. Without it, the recessed mids may bother detail-oriented listeners.

EarFun Free 2S Sound — V-Shaped Clarity with More Air Up Top

The EarFun Free 2S has a V-shaped tuning: boosted bass and elevated treble, with a slightly leaner midrange. The larger 11mm driver gives it noticeably more presence across the frequency range compared to the A20i's 10mm driver.

Bass is punchy and defined — not as warm as the A20i, but more textured. Treble has more sparkle, which makes hi-hats and cymbal crashes more distinct. Vocals are slightly forward, which is a real advantage for podcasts and audiobooks.

The downside: at high volumes, treble can feel just slightly bright. However, at normal listening volumes — around 50–65% — the balance is genuinely enjoyable. I preferred it over the A20i for most of my listening sessions, especially without any EQ app to compensate.

🎧 My Sound Verdict — EarFun Free 2S More balanced out of the box than the A20i. The V-shaped tuning translates to a lively, engaging sound. No app, but the default tuning rarely needs one.

Soundcore A20i vs EarFun Free 2S for Working Out — Which One Survives Your Gym Session?

Both earbuds are rated IPX5, which means they can withstand water jets from any direction — not just light splashing. That means sweat and rain resistance are both covered. However, IPX5 alone does not tell the whole story for gym use.

I wore the Soundcore A20i for a 45-minute treadmill session at moderate intensity. The seal held firm throughout. The semi-in-ear fit creates a secure passive lock without requiring a tight silicon grip. For lower-intensity workouts, this fit is actually more comfortable over time.

The EarFun Free 2S has a similar semi-in-ear design. During a HIIT session with burpees and box jumps, the left bud shifted slightly — I pushed it back twice. It is not a dealbreaker, but high-impact training reveals the fit limitation. For gym use, I recommend trying the largest ear tip size to improve retention.

Battery Life Real-World Test — EarFun Free 2S vs Soundcore A20i

Marketing numbers are always optimistic. Real-world numbers depend on volume level, codec, and ambient conditions. I tested both at 65% volume using SBC codec over an iPhone 15 — the most common everyday scenario.

Soundcore A20i: Marketed at 10 hours per charge. In my test, I reached 9 hours and 12 minutes before the low-battery alert hit. That is excellent for a sub-$40 earbud. The case adds around 18 hours, totaling roughly 27–28 hours. One charge of the case gets you nearly three full work weeks of 1.5-hour daily commutes.

EarFun Free 2S: Marketed at 8 hours per bud. My test returned 7 hours and 44 minutes — consistent with the claim. However, the case battery is significantly larger at 25 hours additional, giving a total system life of approximately 33 hours. If you travel or rarely charge your case, this gap matters considerably.

If single-session battery life matters most, the A20i wins. If you want a larger total reservoir — particularly for travel — the EarFun Free 2S is the stronger long-haul earbud. That said, most daily users will never fully drain the A20i's case in a typical week, so this difference is most relevant for frequent travelers.

Which Is Better for Calls: Soundcore A20i or EarFun Free 2S?

I tested both earbuds across three calling scenarios: a quiet indoor home office, a moderately busy street, and a windy outdoor setting. My test partner rated the audio quality blindly on each call from their end.

Soundcore A20i: Call quality is acceptable indoors — my voice came through clearly and without dropouts. Outdoors, however, the single-mic-per-bud setup shows its limits. Wind noise was noticeable to my call partner, and my voice occasionally sounded slightly muffled. For occasional calls in controlled environments, it works. For regular work calls, it is not ideal without additional noise cancellation. For a deeper look at mic performance across earbuds, see our earbuds with best mic quality for calls guide.

EarFun Free 2S: The dual-mic setup per bud makes a real difference. Indoor calls sound crisp and natural — my test partner said it sounded "like you are in the same room." Outdoors, the environmental noise rejection is noticeably better. Wind interference was reduced, and voice remained clear. The EarFun Free 2S is the better everyday work-call companion of the two.

Comfort, Fit, and Daily Wearability Over Long Sessions

Both earbuds use a compact, stem-free semi-in-ear design — more comfortable than stem earbuds for many users, but dependent on ear shape for a good seal.

Soundcore A20i: The earbuds are lightweight at around 5.7g each. After 2-hour listening sessions, I noticed no hotspots or ear fatigue. The case is compact and fits easily in a front pocket — notably, it includes a wrist strap, which is a thoughtful touch for gym bags. Touch controls have a slight learning curve: double-tap, triple-tap, and long-press actions take a day or two to memorize.

EarFun Free 2S: At roughly 5.5g per bud, the EarFun is marginally lighter. The fit felt marginally snugger in my medium-sized ears out of the box. Ear tips come in three sizes (S/M/L) for both earbuds — I recommend spending five minutes swapping to your ideal size, as it directly affects both bass response and passive isolation. Touch controls on the EarFun are more intuitive from day one, using simpler tap combinations.

For small ears specifically: the compact design of both earbuds makes them a reasonable choice. However, also check out our dedicated best earbuds for iPhone under $100 guide, which includes fit-specific recommendations.

Soundcore A20i — Full Review, Pros & Cons

After three weeks, the Soundcore A20i left me with a consistent impression: it is a remarkably complete earbud for its price, provided you are willing to invest a few minutes in the Soundcore app. Without the app, it is good. With it, it overdelivers at this price point. The 10-hour bud battery is genuinely class-leading sub-$40 — no competitor at this price matches it on per-charge endurance.

What surprised me most was the Bluetooth stability. Over three weeks commuting through crowded areas, I experienced exactly two brief dropouts. That kind of reliability is not guaranteed at this price. The case's wrist strap is a subtle but useful design detail that daily gym users will appreciate.

EarFun Free 2S — Full Review, Pros & Cons

The EarFun Free 2S is the kind of product that quietly wins — not by flashy specs, but by consistently doing everything well without requiring extra effort from you. There is no app to configure. You put them in, they connect (to up to two devices, simultaneously), and they sound genuinely good from minute one. That plug-and-play reliability has real value in a budget earbud.

The dual-mic setup per bud was the single biggest surprise. I have tested earbuds at twice the price with worse call clarity. Add 33 hours of total battery, a faster fast-charge, and multipoint connectivity — and the EarFun Free 2S offers a more complete package for most everyday users than the A20i. Its one real weakness: no EQ app means you accept its tuning as-is.

How They Stack Up Against Other Budget Earbuds

If your budget can stretch to $50, read our full JBL Tune 230NC vs Soundcore Life P3 comparison to see what active noise cancellation adds at that price. For the best multipoint earbuds under $50, we have also covered cheap earbuds with multipoint connection in detail. For a broader overview, the best budget wireless earbuds guide covers the top picks across all price tiers.

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