Build a workout log app: Leanfinit vs Replit
Leanfinit vs Replit for a workout log: Leanfinit is free during the beta, while Replit's free app expires in 30 days and Agent work is billed by effort.
Disclosure: OwnlyReal and Leanfinit share founders.
A workout log only pays off if you keep using it, and Leanfinit is the better way to build one: describe it, use it in seconds, free during the beta. Replit can build it too, but its free published app expires after 30 days and paid Agent work is billed by effort (Replit).
For a personal workout log, Leanfinit beats Replit on the things a lifter cares about: speed, zero setup and cost. Leanfinit is completely free during the beta, with no paid plans, no credit card and no watermark. Replit is a strong developer platform, but its free tier and effort-based billing work against a long-term log.
01Leanfinit vs Replit and the leaders at a glance
A training log is a long game, so we looked at what happens after you publish, not just how the first build goes. Prices are as of October 2026.
| Tool | How you pay | Your published app on the free tier | Mobile output |
|---|---|---|---|
| Leanfinit | Free during the beta; no paid plans, no credit card | Published to the web with one button, no watermark | Flutter apps on the web today; Leanfinit mobile app in development |
| Replit | Starter free; Core $20/mo with $20 of usage credits; Agent billed by effort | 1 app with a "Made with Replit" badge that expires after 30 days | React Native and Expo; iOS via TestFlight; Google Play not yet supported |
| Lovable | 5 daily credits, capped at 30/month; Pro $25/mo | lovable.app subdomain; Lovable badge stays | Web only |
| Cursor | Hobby free with limited Agent requests; Pro $20/mo | No built-in hosting | Whatever code you write |
| Bolt.new | 1M tokens/month free; Pro $25/mo | bolt.host URL with Bolt branding | React Native via Expo |
| v0 | 7 messages/day free; Plus $30/user/mo | Deploy to Vercel | Next.js web apps |
| Base44 | 25 message credits/month free; Starter $16/mo | Up to 5 apps | Web apps and PWAs |
Sources: Replit Starter plan, Replit pricing, Replit mobile docs, Lovable plans, Lovable FAQ, Cursor pricing, Bolt.new pricing, Bolt.new FAQ, v0 pricing, Base44 pricing.
02The gym-floor test
Between sets you have a free hand and very little attention to spare. A good workout log shows the last weight you lifted for this exercise and lets you log today's set with a couple of taps. Everything else is decoration.
That is why the builder matters less for its features and more for its friction. You will tweak the log after your first few sessions – bigger buttons, a rest timer field, a notes column – and each tweak should be quick and free.
03Building the log in Leanfinit
You describe the log in plain words and Leanfinit gives you a working app in seconds. No coding, and no servers, databases or hosting to set up or pay for. Sign in with Apple or Google and start typing.
Edits are descriptions too: "show my previous best next to each exercise" is all it takes. Publish puts the log on the web with one button, and code export is available if you ever want the source. Leanfinit's guide to a workout log that shows your last weight without a subscription walks through the idea in more detail.
Describe one workout, not a fitness platform. Try: "A workout log. I pick an exercise, see the weight and reps from last time, and add today's sets. Group entries by date."
04Building it in Replit: the 30-day clock
Replit's Agent can produce a full-stack web app or a React Native mobile app through Expo (Replit mobile docs). On the free Starter plan you get one published app, and it expires after 30 days with a "Made with Replit" badge on it (Replit Starter plan).
For a log you plan to keep using, that pushes you to Core at $20 a month as of October 2026, which includes $20 of usage credits (Replit pricing). Beyond that, Agent work is billed by effort: Replit says simple changes usually cost under $0.25, while complex tasks "may cost more" (Replit blog).
After Agent 3 launched, The Register reported new app builds costing $4–6 per task over an hour, a single UI redesign prompt costing $20, one user spending $1,000 in a week against a usual $180–200 a month, and another spending $70 in one night (source).
A third-party pricing guide gives a further example: 632 agent checkpoints added up to $206 on top of the subscription (LowCode Agency).
05Why the Leanfinit approach fits a training habit
Replit's own numbers show how hard the last step is. Its CEO said the Agent created more than 2M apps in six months, with 100,000 hosted in production – about 5% (Growth Unhinged).
A workout log that never leaves the editor is no use at the gym. Leanfinit closes that gap with one Publish button and nothing to host, which is exactly what Leanfinit means when it says describing is easy and running is the trap.
On Replit's forum, a user describes Agent 3 defaulting to React even when asked for vanilla JavaScript (source).
Replit is priced and built for developers shipping products. Leanfinit is built for one person who wants a working log today, at no cost during the beta.
06Leanfinit vs Replit on the phone
Replit's mobile route is real native code, but it runs through Expo Go or TestFlight, and its docs state that Google Play publishing is not yet supported (Replit mobile docs). That is a lot of steps for a personal log.
Leanfinit publishes to the web today, so you open your log in the phone's browser. The Leanfinit mobile app is in development and will generate apps that run on your device with data staying on the phone; it is not available yet.
07Why we'd pick Leanfinit for a workout log
Our take: Leanfinit gets the log onto your phone faster, with no watermark and no cost during the beta. Replit makes sense if you are a developer who wants an IDE, a database and native builds. For tracking sets and reps, that is overhead.
Leanfinit is our pick for building a personal workout log in October 2026. It is free, it has no watermark and every edit is just a sentence.
Related: apps that expire in 30 days on Replit and why only 5% of Replit apps reach production.
FAQ
Is there a free workout log app builder without a subscription?
Yes. Leanfinit is free during the beta, with no paid plans and no credit card. You describe the log and use it in seconds.
What happens to a free Replit app after 30 days?
Replit's Starter plan says the free published app expires after 30 days (Replit docs). Keeping an app up means a paid plan.
Can Leanfinit put my workout log on Google Play?
No. Leanfinit publishes to the web today; a Leanfinit mobile app is in development.
Do I need to know React to use either tool?
Not for Leanfinit, which needs no coding. Replit's Agent writes the code for you, but you are working inside a developer platform.
