Retail POS A "mobile POS" claim means very different things across these four systems. One runs on a phone you already own and keeps selling when Wi-Fi dies; another is an iPad you carry; a third is a rugged handheld tied to a reseller contract; the fourth is a store register that happens to detach. This ranking is built on our published 8-criteria scores plus a mobility lens on top — Tap to Pay with no extra hardware, offline behaviour, device support and the real cost of the smallest viable setup.
Quick Picks
Square
A $0 app on your own iPhone or Android phone, Tap to Pay with no reader at all, and a documented offline mode that keeps taking cards for up to 24 hours. The cheapest, most flexible way to sell anywhere.
Jump to breakdown ↓Shopify POS
POS Lite on iPad, iPhone and Android, synced to the same catalog as your online store. The best mobile option if web sales matter — but it needs a paid plan and Tap to Pay needs a connection.
Jump to breakdown ↓Clover
The Flex is a genuine all-in-one handheld — printer, scanner, cellular and ~8-hour battery. Great hardware, but sold through resellers on long terms and no published offline mode.
Jump to breakdown ↓Lightspeed Retail
Runs on iPad and adds a floor-scanning app on higher tiers. Best inventory in the group, but it's a store system you carry, not a phone-first mobile POS.
Jump to breakdown ↓Mobile Comparison Table
| Square | Shopify POS | Clover | Lightspeed Retail | |
|---|---|---|---|---|
| Runs on your own phone/tablet | iPhone, iPad & Android | iPad, iPhone & Android | Clover devices only | iPad (+ Android scanner app) |
| Sell with Tap to Pay (no reader) | Yes — iPhone & Android | Yes — iPhone (needs internet) | Via Clover Go reader | No |
| Offline card payments | Yes — up to 24 hrs, auto-sync | Yes — supported readers only, not Tap to Pay | Not published — confirm with reseller | Yes — offline mode |
| Smallest true mobile setup | $0 app + $10–59 reader | Paid plan + reader (~$49) | Flex handheld (reseller-priced) | iPad + $89+/mo plan |
| Dedicated handheld device | Handheld $399 / Terminal $299 | Reader + stand; BYOD | Flex (printer + scanner + LTE) | Mobile Scanner (Core+) |
| Software entry | $0/mo (Free) | $29/mo+ (annual) | from $16/mo Starter* | $89/mo (annual) |
| Our overall score | 3.8 / 5 | 4.0 / 5 | 3.0 / 5 | 3.6 / 5 |
* Overall scores are our published 8-criteria totals; this page re-ranks them for mobility. Software entry: Square from its $0 plan; Shopify POS Lite is included only with a paid plan (from $29/mo annual); Clover Starter is a $16/mo × 36-month online bundle that carries no inventory module; Lightspeed starts at $89/mo annual. Rates and prices checked 2026-11-05; hardware and offline/tap-to-pay behaviour checked against vendor pages on 2026-11-12.
The Rankings
1. Square — Best Mobile POS for Retail
3.8/5
Square was practically invented as a mobile POS, and in 2026 it's still the most honest "sell anywhere" option. The app is free on your own iPhone, iPad or Android device, and Tap to Pay lets you accept contactless cards with no reader at all — the phone is the terminal. If you'd rather have hardware, the contactless + chip reader is $59 (or $10 for magstripe), the Terminal is $299 and the Handheld is $399.
The killer mobile feature is the documented offline mode: Square keeps accepting cards when the connection drops, stores the transactions and processes them automatically when you reconnect within 24 hours. Square is equally clear about the catch — if you don't reconnect in time, those payments are declined, and the merchant is responsible for any declined or expired offline sales. For a market stall or a shop with flaky Wi-Fi, that's a real safety net.
Pros
- $0 app on your own phone or tablet — nothing to buy to start
- Tap to Pay with no hardware at all
- Offline card sales up to 24 hrs, auto-processed on reconnect
- Cheapest modular hardware ($10–$399) with financing
Cons
- Square processing is mandatory — no negotiated rates
- 2.6% + 15¢ on Free stings on small-ticket sales
- Merchant carries the risk of declined offline payments
- Inventory tools need the paid Plus/Premium tiers
Best for: pop-ups, markets, line-busting, mobile single-store retail. Read the Square for Retail deep dive or visit Square →
2. Shopify POS — Best When Online and On-the-Floor Are the Same Business
4.0/5
Shopify POS runs on iPad, iPhone and Android, and its magic for a retailer who also sells online is that the mobile register shares one catalog, one inventory and one customer database with your webstore. Buy online / pick up in store, local delivery and email carts all live on the same account. Tap to Pay on iPhone means no reader is needed for contactless sales — with two mobile caveats: it requires an active internet connection, and Shopify explicitly lists Tap to Pay as not supported for deferred offline payments.
The bigger constraint for "mobile" is cost: POS Lite is only included with a paid Shopify plan (from $29/mo on annual billing, or $39 month-to-month), and the advanced retail controls most stores eventually want sit behind POS Pro at $89/mo per location. Shopify does offer offline checkout and, on supported card readers, offline card payments that process after you reconnect (recommended within 24 hours) — so it's genuinely usable when connectivity drops, just with more setup than Square.
Pros
- One synced inventory across phone/tablet register and webstore
- Tap to Pay on iPhone — no reader for contactless
- Strong hardware warranty and 24/7 support
- Best omnichannel features of the four
Cons
- No free tier — POS Lite needs a paid plan
- Tap to Pay needs internet and can't defer offline
- Advanced retail controls gated to POS Pro ($89/location)
- Third-party processors add up to a 2% fee
Best for: online-first brands selling in person at markets, shows or a store floor. Read the Shopify POS review or visit Shopify POS →
3. Clover — Best Dedicated Handheld Hardware
3.0/5
Clover's answer to mobile is not your phone — it's the Flex, a purpose-built handheld with a nearly 6-inch touchscreen, a built-in thermal receipt printer, a 1D/2D barcode scanner, Wi-Fi and LTE, and "at least 8 hours" of battery for a typical small business (Clover's own specs). If you want a single rugged device that rings, prints and scans at the counter, on the floor or outside, that's the strongest dedicated mobile hardware here.
The trade-offs are structural. Clover software runs only on Clover hardware, the Flex is typically bundled into the Advanced retail plan (online: Station Duo + Flex for $2,648, or a 36-month subscription) rather than sold as a $0 starter, and standalone Flex pricing is reseller-set — commonly quoted in the $599–$749 range but verify with a written quote. Clover's retail pricing pages don't publish an offline mode, so if selling through an outage matters, get that in writing from your specific partner. The Starter ($16/mo) bundle also carries no inventory module.
Pros
- Flex is a true all-in-one handheld (printer + scanner + LTE)
- ~8-hour battery and polished, durable hardware
- Buy-once hardware model (no per-device tablet to manage)
- Large app market to extend mobile features
Cons
- No BYOD — the app runs only on Clover devices
- Reseller-set pricing and common 36-month terms
- No published offline mode — confirm per-partner
- Starter bundle omits inventory tracking
Best for: busy counters and floor staff who want one rugged handheld and accept reseller pricing. Read the Clover review or visit Clover →
4. Lightspeed Retail — Mobile-Capable, but a Store System First
3.6/5
Lightspeed Retail is iPad-based and offers offline selling, plus a Mobile Scanner app on the Core tier ($149) and above that's genuinely useful for counting stock and receiving on the floor. Its inventory depth is the best in this group. But Lightspeed is designed as a fixed store register that you happen to run on a detachable tablet — it isn't a phone-first mobile POS, its entry price is the highest here ($89/mo annual, no free tier), and the mobile-scanner convenience is locked behind the mid plan.
Choose Lightspeed for mobile when your "mobility" is walking a large store to count and receive thousands of SKUs — not for a suitcase-and-smartphone market stall.
Pros
- Deepest inventory + a floor stock-scanning app
- iPad setups and offline mode
- Best-in-class receiving, transfers and serials
Cons
- Highest entry cost; no free tier
- Not phone-based — it's a store register on a tablet
- Mobile Scanner needs the $149 Core plan
- Annual billing and Lightspeed Payments typical
Best for: high-SKU stores that want to scan the floor with an iPad. Read the Lightspeed review or visit Lightspeed →
The Smallest Viable Mobile Setup — and Its Real Cost
For a market vendor or a single store doing $5,000/month in card sales across roughly 250 transactions, all card-present, the mobile cost is dominated by processing plus the smallest hardware you'll actually carry:
| Cost line | Square (Free) | Shopify (Basic+Lite) | Lightspeed (Basic) |
|---|---|---|---|
| Software /mo | $0 | $29 (annual) | $89 (annual) |
| Processing /mo | ~$168 (2.6% + 15¢) | ~$155 (2.6% + 10¢) | ~$155 (2.6% + 10¢) |
| Smallest hardware | $59 reader (or $0 Tap to Pay) | ~$49 reader (or $0 Tap to Pay, online only) | iPad you already own |
| Year one, cash upfront | ~$2,060 | ~$2,599 | ~$3,359 |
Assumptions: $5,000 ÷ 250 transactions = $20 average ticket; in-person rates from official pages (Square 2.6% + 15¢, Shopify/Lightspeed 2.6% + 10¢, checked 2026-11-05); reader prices one-time; Shopify annual-billing software shown. Clover is omitted because its retail mobile requires a reseller-quoted device bundle we can't price generically. Square is the cheapest genuine mobile start; Shopify's lower per-tap fee doesn't cover its subscription at this small volume — the crossover to Shopify being cheaper lands far above market-stall scale.
How to Choose a Mobile POS
- Decide whether your phone is the terminal. If you want to sell with zero extra hardware, only Square and Shopify offer Tap to Pay — and only Square's works offline.
- Test the offline story in writing. "Offline mode" ranges from Square's documented 24-hour card capture to Clover's unpublished behaviour. Ask what actually happens when the signal drops.
- Match the device to the workflow. A pop-up needs a phone; a big store floor may want a Clover Flex or an iPad with a scanner.
- Count the real cost, not the app price. At small volume, the 15¢-vs-10¢ per tap and any required subscription matter more than the sticker.
- Check battery and connectivity. LTE and an all-day battery (Clover Flex) matter outdoors; Wi-Fi-only tablets don't survive a busy market.
FAQ
What is the best mobile POS for a small retailer?
Square. It's the only one here with a genuinely free app that runs on your own phone, Tap to Pay that needs no reader, and a documented offline mode that keeps taking cards for up to 24 hours and processes them on reconnect. For retailers who also sell online, Shopify POS is the better mobile option despite needing a paid plan.
Can I take card payments with just my phone — no reader?
Yes with Square (Tap to Pay on iPhone and Android, works offline) and with Shopify (Tap to Pay on iPhone — but it requires an internet connection and is not supported for deferred offline payments). Both need the free POS app and their own processing.
Which mobile POS works without internet?
Square documents offline card payments for up to 24 hours with automatic processing on reconnect (the merchant bears any declined expired payments). Shopify offers offline checkout and offline card capture on supported readers (not via Tap to Pay). Lightspeed supports offline selling. Clover does not publish an offline mode for retail — confirm with your reseller.
Is a phone-based POS or a handheld device better?
A phone is cheapest and most portable (Square/Shopify Tap to Pay). A dedicated handheld like the Clover Flex adds a built-in printer, scanner, cellular and ~8-hour battery — better for a busy counter or outdoor stall, but you buy the hardware and usually commit to a reseller plan.
Do I need a paid plan to go mobile?
Not with Square ($0 app). Shopify's POS Lite requires a paid plan (from $29/mo annual). Lightspeed starts at $89/mo and Clover's mobile runs through device bundles on reseller terms. For a pure $0 mobile start, Square is the outlier.
Final Verdict
For most retailers who need to sell anywhere, Square is the best mobile POS — free to start, Tap to Pay with no hardware, and the clearest offline safety net. Pick Shopify POS when the same stock has to sell online and on the floor, the Clover Flex when you want one rugged handheld with a printer and cellular, and Lightspeed only when "mobile" means scanning a large store's inventory rather than packing up a stall. Confirm each vendor's current offline and Tap to Pay terms in writing before you commit.
Software prices and in-person rates checked 2026-11-05 against vendor pricing pages; hardware, offline and Tap to Pay behaviour verified against official vendor pages on 2026-11-12. Third-party handheld/reseller prices are marked as estimates. Vendors change terms often — confirm before buying.