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Fixed-price offerA developer on a monthly plan. One request at a time, most back in about 2 days.

Skip the quote for every small job. Send requests for your app or website, and they are worked on one at a time: bug fixes, features, Stripe and AI work, store-build updates. Code arrives as pull requests you merge. Pause or cancel anytime.

Subscribe: Starter, $1,495/monthSubscribe: Studio, $3,995/month

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Check fit by email

Billed monthly in advance. Work starts within 1 business day of payment and repo access. Pause or cancel by email before your next billing date.

Price checked .

No call needed. Ask a question first by email at simon@app369.com or with the contact form; we reply by email, usually within one business day.

Starter or Studio

Both work on one request at a time, so Studio is not faster. It covers more apps and bigger work.

Starter

$1,495/mo
Billed monthly, pause or cancel anytime
Apps
One app or website
Work
Bug fixes, small features, UI and copy changes, Stripe, Firebase or Supabase fixes, and dependency and store-build updates
Pace
One request at a time; most back in about 2 business days
Subscribe: Starter, $1,495/month

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Studio

$3,995/mo
Billed monthly, pause or cancel anytime
Apps
Up to 3 apps or websites
Work
Everything in Starter, plus new features, screens, AI features and integrations
Pace
The same, one request at a time; larger features are split into several pieces over the month
Subscribe: Studio, $3,995/month

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Not included

  • More than one request in progress at a time
  • Emergency or after-hours support (see Ongoing maintenance)
  • New apps built from scratch (quoted as a Web App MVP Sprint)
  • App Store approval guarantees
  • Your hosting, database, Stripe or AI bills

Delivery

Work starts within 1 business day of payment and repo access. Business days are Monday to Friday, Eastern Time.

After you pay

Simon emails you within one business day to confirm and send the access checklist. You can also send it straight away to simon@app369.com. What the work needs:

Monthly Dev Subscription: Starter

  • Access to the repository of your app or website
  • Your first request, with steps to reproduce if it is a bug

Work starts within 1 business day of payment and repo access.

Monthly Dev Subscription: Studio

  • Access to the repositories of up to 3 apps or websites
  • Your first request, and the order you want the next ones in

Work starts within 1 business day of payment and repo access.

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Not sure it fits? See who it fits, or email a question about this offer; we reply by email, usually within one business day.

This fits when

  • You have a steady list of small changes and fixes, not one big project
  • Quoting every job takes longer than the job
  • Your app was built by someone who has moved on
  • You want Stripe, Firebase, Supabase or AI work done without hiring

How it works

  1. Subscribe and send repo access

    Pick Starter or Studio, then reply to the Stripe receipt with repo access and your first request.

  2. Send requests in order

    Add requests by email whenever you like and say which comes first. One is worked on at a time.

  3. Review pull requests

    Most requests come back in about 2 business days as a pull request with a note on what changed and how it was tested. Bigger ones are split into pieces.

What requests and pull requests look like

Three recent changes to App369’s own website (pull requests #392 to #394), each written as the request it answered, with what came back.

  1. The Shopify checker’s top panel is cut off on small phones

    What came back
    A one-line layout fix as its own pull request
    How it was checked
    Rendered at 312 pixels wide in light and dark mode

  2. Add Shopify’s March 1, 2027 script tag date to the Shopify checker

    What came back
    A new callout, a summary line, a question in the FAQ and a link to Shopify’s changelog
    How it was checked
    The date checked against Shopify’s changelog post

  3. Link the two new checkers from the guides that mention them

    What came back
    Links added to two guides
    How it was checked
    The site’s smoke test passed after release

Sample only: App369’s own website, not a client’s project. Your requests go to your repositories, and each one comes back as a pull request with a note on what changed and how it was tested.

See the Shopify checker from the first two requests

Questions before you pay

What is a request?
How does pausing work?
How much work fits in a month?
Do I need calls?
Is this the same as ongoing maintenance?
Do I need a call before I pay?
Who owns what you deliver?

Fiverr reviews / 95 on app work

What buyers said about this kind of work

Read 126 of the 127 reviews
  • “I work with Szymkn to fix bugs and implement small features and he always delivers on time. thanks again”
    A buyer in the United States, January 2021. App development on Fiverr
  • “This seller did an amazing job again. He always knows exactly how to complete any crazy ideas I bring to him. Thank you”
    A buyer in the United States, December 2020. App development on Fiverr
  • “I can't say enough about Simon. He took my idea and gave me an amazing app. This App was not simple it was full of complicated math and has an amazing map and calculator feature... I can't wait to continue to develop more apps with Simon. the possibilities are endless. Thank you Simon”
    A buyer in the United States, December 2020. App development on Fiverr

Read the whole story

Ready to start?

Pay online and send what the work needs by replying to the Stripe receipt. Simon, who builds and runs the SaaS Workspace369, does the work himself.

Subscribe: Starter, $1,495/monthSubscribe: Studio, $3,995/month

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Further reading

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