Comparison

ProMEX vs Shoal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ProMEX

Features
Read full description

Whether you’re a project developer, corporate or individual buyer, trader or investor we have the tools to help you achieve your goals with greater confidence and efficiency. CONTROL View the market and your portfolio marked to current prices, follow their movements, see supply and demand in real-time and access historic data graphs to form your decisions. CARBON CREDITS With ProMEX, you can buy and sell carbon credits at the best available prices in an electronic central order book, consistent with the standards of global exchanges. Under your full discretion, we may hold your credits in custody with our designated registries. CASH MANAGEMENT Make deposits and withdrawals of funds at your convenience through the app. Your money is held with a high street bank in a segregated account. DELIVERY Take delivery of or retire your holdings using our convenient transfer and retirement services directly with the registry. TECHNOLOGY Our platform is run on a highly secure cloud-based architecture so you can execute trades efficiently and safely to focus on your strategy and core business. The whole process is fully digital, transparent and reduces manual procedures and paperwork.

About

Shoal

Grow your savings while supporting sustainable global projects. Track your positive environmental impact and contribute to UN Sustainable Development Goals. Your savings are protected and help fund green initiatives.

Highlights
  • Earn returns on savings
  • Support green and social projects
  • Track CO2e avoidance
  • Track clean water generation
  • Contribute to UN SDGs
  • FSCS protected savings
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Earn a great return on your savings as you help support a global portfolio of sustainable projects. Can you increase your savings as you help lower CO2? Shoal you can. - All in. 100% of your money helps support a global portfolio of green and social projects and companies². - Track your contribution. See the CO2e avoidance and clean water you help generate with your savings while growing your wealth². - Good for your wallet, good for the world. Contribute to a range of the United Nations' Sustainable Development Goals². All Savings Pots up to £85,000 are protected by FSCS³. - Shoal's mission Our mission is to empower people to achieve their financial goals while promoting environmental and social responsibility. — 1. Rates shown are indicative, latest rates are available in the Shoal App. Rates shown are annualised (AER). Returns on savings are repaid at the end of the savings term. 2. The impact of your savings is reflected in CO2 avoided or clean water generated, however these are benchmark statistics and do not guarantee that all products that your savings support directly contribute to the generation of clean water or reduction / avoidance of CO2 emissions. The Sustainable Finance portfolio against which your savings are referenced is provided by Standard Chartered Bank. Standard Chartered Bank is authorised by the PRA and regulated by the FCA (FRN 114276) and the PRA. For more information on the wider portfolio of sustainable projects and companies your savings help to support and how your impact is measured, read our FAQs. 3. For more information on how we ensure that your funds are kept safe at all times, read our FAQs.

Screenshots

ProMEX4 screens
Shoal3 screens

Verdict

The call

ProMEX and Shoal are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
ProMEX versus Shoal: the parameters behind the verdict, then further details
ParameterProMEXShoal
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—90.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size40 MB149 MB
Age rating4+4+
DeveloperProMEX LimitedAlgbra FS UK Limited

In-app purchases

None

ProMEX

No in-app purchases

None

Shoal

No in-app purchases

Questions

Is ProMEX free?
ProMEX is free to download, with no in-app purchases.
Is Shoal free?
Shoal is free to download, with no in-app purchases.
Do ProMEX or Shoal have ads?
Neither ProMEX nor Shoal shows ads.
Which is updated more often, ProMEX or Shoal?
ProMEX ships an update every 2 months, and Shoal every 2 months. Most recently, ProMEX was updated on October 25, 2026 and Shoal on October 30, 2026.

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