Postfast help and frequently asked questions
How Postfast works, how to publish, what the subscription costs and what happens to your data: short answers to the questions we get most often.
Just installed Postfast?
Follow the Getting started guide: it walks you through your first minutes in the app, step by step. To publish on eBay, see the eBay guide.
Getting started
What is Postfast?
Postfast is an app for reselling second-hand items, on iPhone, Android and computer. You photograph an item: the AI writes the listing (title, description, hashtags) and estimates the price. Postfast then helps you publish to the platforms in your country, and track your purchases, your sales, your stock and your margins. The app works in 13 European countries.
Is Postfast free?
Yes. The free plan gives you 10 free generations when you sign up, then 5 a month, renewed every month on your sign-up date. One generation writes a listing or values a purchase. You also get 3 free photo edits, once. Every feature is included, such as margin tracking, CSV export and direct eBay publishing for sellers in France. The PostFast Plus subscription is only for doing more: more generations, bigger batches and more photo edits.
Where can I download Postfast?
On the App Store for iPhone and on Google Play for Android. It is free to download. From a phone, the link postfast.fr/telecharger-en takes you straight to the right store. Postfast is available in 13 countries: the United Kingdom, Ireland, France, Belgium, Switzerland, Luxembourg, Germany, Austria, the Netherlands, Spain, Italy, Portugal and Poland.
Does Postfast work on a computer?
Yes. Open postfast.fr/app in your browser and sign in with the same account as on your phone: your listings, purchases and margins are all there. On a computer, you add your photos from your files. Two things can only be done in the phone app: taking out the subscription or buying a photo edit pack, and connecting your eBay account. Once done, they work on the computer too.
Which countries can I sell from?
From 13 countries: the United Kingdom, Ireland, France, Belgium, Switzerland, Luxembourg, Germany, Austria, the Netherlands, Spain, Italy, Portugal and Poland. You choose your selling country when you sign up. It decides which platforms you are offered and the currency of your amounts. You can change it at any time in the Settings tab.
Which languages does Postfast work in?
8 languages: English, French, German, Spanish, Italian, Dutch, Portuguese and Polish. The app language and the language of your listings are set separately, in the Settings tab. A single listing can be written in up to 3 languages.
Create and publish
How does Postfast actually work?
You take or choose photos of an item and tap “Generate listing”. The AI works out what the item is and writes the listing. You check it, edit it if needed and set your price. Then you publish: straight to eBay if you sell from France, and everywhere else by assisted copy and paste (Postfast copies the title, then the description, and you paste them on the platform). The Getting started guide shows each step.
How many photos can I add?
Up to 20 photos per listing. The AI analyses the first 5: put the sharpest photos first, the ones that show the whole item, the brand or the label. In Buying mode, the AI analyses the first 3.
Can I prepare several listings at once?
Yes. Prepare your items one after another, then start the generation: the listings are written in the background, and you check the first one while the others finish. Up to 5 listings per batch on the free plan, and up to 20 with PostFast Plus. Each listing counts as one generation.
A generation failed: have I lost it?
No. When the AI cannot write the listing, the generation is given back to you. Try again with sharp photos of the item. If it keeps failing, email us at hello@postfast.fr.
Which platforms can I publish to?
Postfast covers 51 platforms across 13 countries, up to 23 per country, and only shows the ones in your selling country. In the UK that means eBay, Vinted, Facebook Marketplace, Etsy, Vestiaire Collective, Depop, Gumtree, Vivastreet, Shpock, Preloved and Locanto; in Ireland, DoneDeal, Vinted, Facebook Marketplace, eBay, Etsy, Vestiaire Collective, Depop, Adverts.ie, Vivastreet and Locanto.ie. France has 23, including Leboncoin, ParuVendu and nine specialist sites such as HardWare.fr and NaturaBuy, and you will also find Kleinanzeigen in Germany, Wallapop in Spain, Subito in Italy and Marktplaats in the Netherlands. Postfast is not affiliated with any of these platforms: you sell from your own accounts.
Does Postfast publish to Vinted or Gumtree automatically?
No. Postfast prepares the listing and copies it for you, but you paste it and publish it yourself. Tap “Copy the title”: the platform opens, you paste the title and add your photos. When you come back to Postfast, the description is copied: go back and paste it. Postfast does not sign in to your Vinted, Gumtree or other platform accounts, and never asks for their passwords.
I pasted the title. Where is the description?
Come back to Postfast: the description is copied when you return. Then go back to the platform and paste it into the description field. On a computer, if it is not already copied, copy it from the Postfast tab, then paste it with Ctrl+V (⌘+V on a Mac).
Can I publish straight to eBay?
Yes, if you sell from France. Connect your eBay account once from the phone app (official connection: Postfast never sees your eBay password), set up your eBay selling terms, then publish in one tap. The first time a listing goes out on eBay, it counts as one generation; updating it afterwards is free. Outside France, including in the UK and Ireland, eBay works like the other platforms, with assisted copy and paste. The eBay guide explains each step.
Can I customise my listings?
Yes, in the Settings tab: the tone (casual or professional), emojis, hashtags, an opening line and a closing line (you can keep several and choose which one applies), and your Vinted username. A new line applies to listings generated after that, not to ones already created. Every listing stays editable before you publish: title, description, price and hashtags.
How reliable is the price estimate?
It is a starting point, not a guarantee. The AI estimates a price from what it knows of the second-hand market and, for some items, compares it with live eBay listings. To check, the app opens in one tap the eBay sales that went through (the prices actually paid), plus live listings on Vinted and on the main classifieds site in your country, such as Gumtree in the UK or DoneDeal in Ireland. On live listings, you see asking prices, not sale prices. You set the final price. Read more: how Postfast estimates resale prices.
Photo editing
What is AI photo editing?
From one of your photos, the AI creates a version that sells better. The modes depend on the item: for clothing, studio background, invisible mannequin and on a hanger; for other items, studio background and styled setting. Be aware: the invisible mannequin smooths the fabric and can soften the wear a little. The app warns you first. Always check that the photo still matches your item. Your original photo stays in the listing.
How much does a photo edit cost?
One photo edit = one generated image. Editing 5 photos therefore costs 5 photo edits, and each retry costs one more. Comparing the results and keeping the one you prefer costs nothing, and a photo edit that fails is given back. The free plan gives 3 photo edits, once; PostFast Plus gives 10 a month. For more, packs are sold with no subscription, on the free plan too: 30 photo edits for €2.49, 70 for €4.99 or 180 for €9.99 (prices in France). Packs are bought in the phone app, and photo edits you buy never expire.
Purchases and margins
How does Buying mode work?
Before you buy, at a car boot sale or a flea market, photograph the item in Buying mode. Postfast identifies the items and estimates their resale value, item by item. You see the possible margin against the asking price, and the app opens price searches so you can check for yourself. A valuation counts as one generation. Postfast does not tell you what to buy: the decision is yours.
Can I track my margins and my profitability?
Yes, it is the heart of Postfast. Record your purchases, job lots included: the cost is split across the items according to their value. Link each sale to its purchase and enter the platform fees: Postfast works out your net margin and your return on investment (ROI). The Tracking tab shows your best and worst purchases and your sales at a loss, and you can spot the stock that is not moving. See also: how to work out your resale margin and ROI.
Can I import or export my data?
Yes, on every plan. You can import your purchases and your sales from a CSV file, and export your listings and your stock to CSV.
Subscription and payment
How much does PostFast Plus cost?
€6.99 a month or €69.99 a year at the launch price (soon €9.99 a month). PostFast Plus gives you generations without limits (within reasonable use), batches of up to 20 listings and 10 photo edits a month. Every other feature is already in the free plan. There is no commitment: you can cancel whenever you like. You subscribe in the app, on iPhone or Android.
What does “launch price locked for life” mean?
The price of PostFast Plus is going up for new subscribers. If you subscribe now, at the launch price, you keep that price for as long as your subscription stays active, even after the increase.
How do I cancel my subscription?
Your subscription is managed by the store that charges you: the App Store or Google Play. In Postfast, open the Profile tab and tap “Manage my subscription”: the store’s subscriptions page opens. You can also go straight to the subscription settings of the App Store or Google Play. Cancel at least 24 hours before the renewal date. You keep PostFast Plus until the end of the period you have already paid for. Note: deleting your Postfast account does not stop the subscription.
Can I get a refund?
Payments go through Apple or Google, who take the money. So refund requests are made to them, under their rules: to Apple if you paid on an iPhone, to Google Play if you paid on Android. If something went wrong, email us as well at hello@postfast.fr.
I have a new phone: how do I get my subscription back?
Install Postfast and sign in with the same account: your subscription and the photo edits you bought are tied to your Postfast account. If the subscription does not show, open the Profile tab and tap “Restore my purchases”, using the Apple or Google account that paid. The subscription is always managed in the store where you took it out.
I am not in the eurozone: which currency will I pay in?
The prices on this site are in euros. The App Store and Google Play charge in your country’s currency: pounds sterling in the UK, Swiss francs in Switzerland, złoty in Poland. The amount follows the store’s price grid, so it is not an exact conversion: the exact price is shown in the app before you pay. In the app, your purchases, sales and margins are shown in the currency of your selling country. One exception: Buying mode values items on the French market, in euros.
Account and data
Are my photos and my data protected?
Your photos are resized and compressed on your phone before they are sent. Up to 5 photos per listing (3 in Buying mode) are sent to our artificial intelligence providers for analysis: OpenAI to recognise the item’s category, and Google to write the listing and estimate the price. Each photo you choose to edit is also sent to Google. They process them for as long as it takes to answer our request, and their terms provide that the data sent is not used to train their models. The photos in your listings are kept on our servers (Supabase Storage, European Union), because they are part of the listing. They can only be reached through time-limited signed links, and are deleted along with the listing or with your account. Your account data is stored in the European Union (Supabase, Frankfurt). All the details are in our privacy policy.
How do I delete my account?
In the Profile tab, scroll down to the red “Delete my account” button, just below “Sign out”. Deletion is immediate and permanent: your listings, purchases, sales and preferences are erased. If you subscribe to PostFast Plus, cancel the subscription in the App Store or Google Play first, because deleting the account does not stop it. If you can no longer sign in, the Delete my account page explains how to send the request by email.
How do I contact the Postfast team?
Email hello@postfast.fr, from your account’s address if you can. For a problem, say whether you use an iPhone, an Android phone or a computer, and attach a screenshot. To suggest an idea, you can also use the “Feedback” form at the bottom of the Settings tab.
Read next.
Getting started · Connect eBay & publish · Estimate the resale price · Work out your margin & ROI
Download Postfast
Free on iPhone and Android. On a computer, open the web app with the same account.
Got a question? Email us at hello@postfast.fr.