- Highs: Compact card machine. Works anywhere with 3G or WiFi. No ongoing fees. Simple to use. Dock included.
- Lows: Few software features. No integration with POS system, printer or product library. Battery life could be better.
- Buy if: You want a stylish, pocket-sized card terminal for basic card payments with tipping options.
Get SumUp Solo for just £99 + VAT. No ongoing fees or contract. Free delivery in 2-3 working days.
Mobile Transaction is an independent payment industry resource trusted by over a million small businesses per year.
We allow solution providers to offer product discounts for the benefit of our readers. These discounts do not influence our editorial content such as reviews or recommendations. Ratings are based on full retail price. (Full policy)
How SumUp Solo works
SumUp is known for its user-friendly, simple card payment solutions for small businesses and sole traders alike.
The latest card terminal, SumUp Solo, is a special one: a square-shaped, standalone card reader without a physical PIN pad. Instead, it is operated exclusively via the front-facing touchscreen, like a purpose-built mobile device for card payments.
Accepted cards
The card reader comes with a built-in SIM card with unlimited data for 3G connectivity, but can also function through WiFi.
It is therefore ideal as a mobile card terminal that works on even low network connections, as well as for table-service in, for example, a small café with a secured WiFi network.
To accept a card payment, you enter an amount and custom description on the screen, proceed to add a tip (if relevant), process the card and send a digital receipt. Transactions can be viewed and refunded on the terminal.
Solo accepts a wide selection of chip and PIN and contactless cards and mobile wallets.
Payments are automatically settled in your bank account within 1-3 working days, or the next day (including weekends) in an online SumUp account linked to a SumUp Mastercard that is free to use.
Photo: Emmanuel Charpentier (EC), Mobile Transaction
All the box contents of a SumUp Solo package.
Fees and pricing
SumUp Solo only costs a one-off price of £99 + VAT. No setup fee applies, and it gets delivered for free within 2-3 working days. If you change your mind about the purchase, there’s a 30-day money-back guarantee on Solo.
There is no monthly fee, contractual commitment or other ongoing costs, just a fixed rate of 1.69% per card payment.
| Charges | |
|---|---|
| SumUp Solo | £99 + VAT |
| Shipping | Free |
| Contractual commitment | None |
| Monthly fees | None |
| Transaction fee (any card) | 1.69% |
| Payouts in 1-3 working days | Free |
| Refunds | Before payout: Free After payout: SumUp charges transaction fee |
| Chargebacks | £10 each |
| Charges | |
|---|---|
| SumUp Solo | £99 + VAT |
| Shipping | Free |
| Contractual commitment | None |
| Monthly fees | None |
| Transaction fee (any card) | 1.69% |
| Payouts in 1-3 working days | Free |
| Refunds | Before payout: Free After payout: SumUp charges transaction fee |
| Chargebacks | £10 each |
Payouts are processed free to your bank account, or to the SumUp Card account if you are directing payouts there.
It is free to refund card transactions, as long as the transaction has not yet been settled in your bank account (i.e. within 1-3 days of the original transaction). After that, SumUp will charge a 1.69% transaction fee to process the refund.
If a customer disputes a payment, a chargeback fee of £10 occurs.
Terminal features
SumUp Solo is a totally unique card terminal to enter the UK market. It is the first card machine 100% designed by SumUp in-house by a team of over 100 engineers and product designers. Previous card readers – such as SumUp Air – were partly designed by SumUp, using certain hardware components by third parties.
Photo: Emily Sorensen (ES), Mobile Transaction
SumUp Solo checkout screen.
Photo: ES, Mobile Transaction
SumUp Solo menu screen.
And the result? A simple touchscreen terminal that can constantly evolve with software updates. It is comfortable to hold in your hand, lightweight and easy to slide into a pocket. The built-in software is quite basic at this point, but SumUp may add features down the line.
| Tech specs | |
|---|---|
| Dimensions | 83 x 83 x 17 mm |
| Card reader weight | 147 g |
| Display | Touchscreen, greyscale |
| PIN pad | On touchscreen (no push-button PIN pad) |
| Connections | GPRS, EDGE, 3G, WiFi, Bluetooth |
| SIM card & data | Built in, unlimited free data |
| Card reader technology | EMV (chip), NFC (contactless) |
| Battery life | 100 transactions from full charge |
| Accessories included | SumUp Solo card reader, USB-C charging cable, charging cradle with clear lid, card brand decals |
| Tech specs | |
|---|---|
| Dimensions | 83 x 83 x 17 mm |
| Card reader weight | 147 g |
| Display | Touchscreen, greyscale |
| PIN pad | On touchscreen (no push-button PIN pad) |
| Connections | GPRS, EDGE, 3G, WiFi, Bluetooth |
| SIM card & data | Built in, unlimited free data |
| Card reader technology | EMV (chip), NFC (contactless) |
| Battery life | 100 transactions from full charge |
| Accessories included | SumUp Solo card reader, USB-C charging cable, charging cradle with clear lid, card brand decals |
The (non-colour) touchscreen is highly responsive. When it’s on standby and not in the accompanying dock, you simply tap the dark screen to show the checkout screen. If stationed in the dock, you have to press the power button on the side to activate the screen.
Photo: ES, Mobile Transaction
Solo’s display in strong sunlight.
You can adjust the screen brightness to suit any environment and set it to turn off the screen after 30 seconds, 1-5 minutes or never.
We tested the maximum screen brightness in strong sunlight, and the screen was still readable. However, it was grey and not bright in the sun – though better than the performance of SumUp 3G’s display that has had complaints about being hard to see in the sun.
The battery life is officially 100 transactions from a full charge, but in reality, it depends a lot on how it’s used.
With maximum screen brightness and frequent testing, the battery did not take more than an hour to use half its power. If you only used it for transactions, with low screen brightness, it would last longer. It also drains the battery within hours to keep it on standby.
It takes a few hours to charge Solo from 0% to 100% – not quick, so you should always make sure it’s got enough power when it’s most needed.
What about the software? Here are the features:
Checkout screen: Numerical keypad where you enter a transaction amount and custom description to go on the receipt. You cannot enter multiple amounts for one bill or add products from an inventory library.
Photo: ES, Mobile Transaction
You can only enter one amount per transaction.
Photo: ES, Mobile Transaction
Entering a transaction description can be fiddly with big fingers, as the keys are small.
Photo: ES, Mobile Transaction
It can take several seconds before it’s ready to accept a card.
Photo: ES, Mobile Transaction
Ready for a contactless or chip and PIN transaction.
Digital receipts: After each successful transaction, you can send a receipt via email or text message (it’s all free).
Photo: ES, Mobile Transaction
Receipt options after a payment.
Photo: ES, Mobile Transaction
Entering a mobile number for SMS receipt.
Tipping: Turning on ‘Smart Tipping’ will display tipping suggestions before each payment, which has been shown to increase your tipping income. The customer can either choose a tip like £2 or 15% (depending on transaction value), add a custom amount or choose not to tip.
Photo: ES, Mobile Transaction
Smart tipping options before a payment.
Photo: ES, Mobile Transaction
Tipping settings.
Connections: Toggle on/off WiFi and log into your WiFi network from the main menu. If it’s switched off, the terminal will use its SIM card to connect with the best available mobile network.
Sales history: View your transaction history on a list, sorted into dates. Tapping on a transaction gives you more details about the transaction, and options to refund or resend an SMS or email receipt.
Photo: ES, Mobile Transaction
Sales history section.
Photo: ES, Mobile Transaction
Transaction options.
Languages: Set the language to almost any European language. This is useful if you’re going on a business trip abroad (SumUp Solo can be used abroad under some circumstances) or serving non-English-speaking clients.
That’s it for features. You cannot connect the terminal with a point of sale (POS) app or add more features, but SumUp may decide to add new functions through its regular software updates. For instance, we experienced a sudden increase in language options from one day to another while testing.
The card machine automatically shows when new updates are available, but you can also check software updates manually on the terminal. If you need to, you can log out of the SumUp account from the settings menu (you must log in with your SumUp account details the first time you use it).
Accessories and printed receipts
Since this is a standalone card machine, there are not many accessories to connect it with.
The main accessory – included in the package – is a non-slip display stand to put on a countertop. This doubles as a charging dock with an internal storage compartment for a USB charging cable.
Photo: EC, Mobile Transaction