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Show HN: Riace – a hands-free interval timer I built while getting back in shape

https://apps.apple.com/it/app/riace/id6760669387
2•mrdobelina•10h ago
I always wanted to be a developer, and it was quite long time that I was planning to get fit and change my habits (smoke, fast food, alcohol, and so on)

I run a food business (American style potato rolls), and definitely I'm not a developer, even tho I've been working as project manager for a decade being the intersection between designers and developers. At the end of 2024 something changed in me, so I started my Project Riace to get fit, and while doing this I built an app that helped me on my plan.

Starting at 87.8 kg with 28% body fat, I'm now 72 kg with 11% body fat, without losing any muscles (actually I gained about 1kg) and this thanks to a nutritionist, a personal trainer and lot of tennis. No shortcuts, just eating well and training seriously each day, starting from 10 minutes each morning, every morning.

Why I'm telling you this? Because I'm in this new better version of me, thanks also to AI.

I trained Claude with my nutritional plan made by my doctor, my exercise made by my trainer, and my goal for this summer — it has been like having a 24/7 nutritionist and personal trainer in my pocket.

But, I'm here to show you the app I made, obviously called "riace." — it's an interval timer for workouts (tabata, emom, recovery, timer) with voice control, and a personal spin on the visual part to visualise the time spent training. It's a free app, no subscriptions, no account, nothing. Just your training side-kick, as it was for me.

It has been fully built with Replit, with the help of Claude on certain parts. I orchestrated everything, tested, refined, iterated and made the UI/UX. I know here many of you are real developers, but for me this tool (Replit) is a life changer. I can finally build what I have in my mind.

The project actually started from an idea I had using a led bar timer with Arduino, which I actually built, but paused for the moment because I want to make one step at a time.

This app won't change your life, I didn't reinvent the wheel, but it changed my life! Going from an iPhone pics folder called "Road to Canotta" (Road to tank top) in 2016, now I can finally walk on the street proud of my body and with an app made by me in my phone, and hopefully yours.

Happy to answer any question!

How to Love the World More: George Saunders on the Courage of Uncertainty

https://www.themarginalian.org/2026/07/20/george-saunders-uncertainty/
1•the-mitr•3m ago•0 comments

Show HN: Clair – open-source semantic news API

https://clair.im
1•kaanersoy•7m ago•0 comments

Visualizing the Artemis II Mission

https://foxglove.dev/blog/visualizing-the-artemis-ii-mission
1•msadowski•8m ago•0 comments

Did Claude Code became faster after Bun switch

https://claude.com/product/claude-code
1•preetham_rangu•9m ago•0 comments

Paraphraser AI – a rewriter with controls for meaning, tone, and keywords

https://tryparaphraser.com/
1•dinglumeng•10m ago•0 comments

Incremental View Maintenance on DuckDB

https://github.com/ila/openivm
2•hantusk•13m ago•0 comments

Fake kits worth £18M seized by police during World Cup

https://www.bbc.co.uk/sport/football/articles/c0rdgrkx552o
1•mmarian•17m ago•0 comments

NameRank: The Model Knows Your Project, Not You

https://01.me/research/namerank/
1•jarrett-ye•18m ago•0 comments

Escape Analysis in Go: Stack vs. Heap Allocations Explained

https://blog.jetbrains.com/go/2026/07/20/escape-analysis/
1•ingve•20m ago•0 comments

Grok Build Is Open Source, but xAI Won't Take Your Patches

https://www.vincentschmalbach.com/grok-build-open-source-contributions-closed/
1•vincent_s•20m ago•0 comments

How the Western Diet Has Derailed Our Evolution (2015)

https://nautil.us/how-the-western-diet-has-derailed-our-evolution-235683
1•XzetaU8•22m ago•0 comments

Isolation Failure from Shared Storage: Page-Cache SCA Leakage Across Containers

https://arxiv.org/abs/2607.17518
1•sbulaev•24m ago•0 comments

German government approves new gas power plant auctions to back up wind andsolar

https://www.cleanenergywire.org/news/german-government-approves-new-gas-power-plant-auctions-back...
2•leonidasrup•24m ago•0 comments

ANSI escape injection in MCP servers: Hidden from humans, visible to AI

https://brightsec.com/research/detecting-ansi-escape-sequence-injection-in-mcp-servers-with-dast/
1•xgpyc2qp•29m ago•0 comments

China's AI models have Trump's AI world at war with itself

https://www.technologyreview.com/2026/07/20/1140675/chinas-ai-models-have-trumps-ai-world-at-war-...
1•joozio•29m ago•0 comments

Show HN: SteerPlane – open-source runtime guardrails for AI agents

https://github.com/vijaym2k6/SteerPlane
1•vijaym2k6•30m ago•0 comments

Free website-cost calculator and open CC-BY dataset of what web projects cost

https://projectcostestimator.com
1•VrumVrum•34m ago•0 comments

Ask HN: Does it make sense to rotate AI accounts regularly?

1•kls0e•35m ago•1 comments

An open-source model on par with DeepSeek v4 has appeared in South Korea

https://old.reddit.com/r/LocalLLaMA/comments/1v23c6w/motif_3_beta_released/
1•haebom•36m ago•0 comments

Show HN: Claude is getting an attitude

2•_nhh•36m ago•0 comments

Head to head: GLM 5.2 vs. OpenAI: GPT-5.6 Sol

https://runtimewire.com/article/head-to-head-glm-5-2-vs-openai-gpt-5-6-sol
1•ryanmerket•44m ago•0 comments

Commonsense Lessons from the Silicon Valley VC Cash Splash and Metaverse Fail

https://medium.com/@vektormemory/commonsense-lessons-from-the-silicon-valley-vc-cash-splash-metav...
2•vektormemory•49m ago•0 comments

Raided Myanmar Scam Compounds

https://www.abc.net.au/news/2026-07-21/myanmar-scam-compounds-exponential-growth/106603324
2•Gaishan•49m ago•0 comments

Musk says new 2T param Grok model to be trained on SpaceX engineering corpus

https://twitter.com/elonmusk/status/2079446276299465185
1•handfuloflight•51m ago•0 comments

Why design matters for a web framework: a 7-year evolution

https://wasp.sh/blog/2026/07/13/why-design-matters-for-a-web-framework
1•franjo_mindek•57m ago•0 comments

Cortisol Could Be the Next Frontier for Wearables

https://spectrum.ieee.org/cortisol-continuous-monitor-wearable
2•arnejenssen•57m ago•0 comments

Listening to Number Sequences from Oeis

https://oeis.org/listen.html
2•marysminefnuf•1h ago•0 comments

Linux kernel will support $ORIGIN, sort of

https://fzakaria.com/2026/07/20/linux-kernel-will-support-origin-sort-of
3•ingve•1h ago•1 comments

Open SDK for AGM AG32 Combo RISC-V/FPGA Chip

https://github.com/bbenchoff/AGaMEMnon/
3•djfergus•1h ago•0 comments

Limine: Modern, secure, portable, multiprotocol bootloader and boot manager

https://github.com/Limine-Bootloader/Limine
1•noteness•1h ago•0 comments