Comparison
Seryz next to the paid workout logs
Most gym logs are free to install and paid to use fully. This page lines Seryz up with the four most common paid trackers, on criteria you can check yourself, including the ones where Seryz loses.
Facts checked on August 12, 2026 against the United States App Store listings.
Feature comparison between Seryz, Hevy, Strong, JEFIT and Fitbod
| Criterion | Seryz | Hevy | Strong | JEFIT | Fitbod |
|---|---|---|---|---|---|
| In-app purchases | Free | $2.99 / month$23.99 / year$74.99 once | $4.99 / month$29.99 / year$99.99 once | $12.99 / month$69.99 / year | $15.99 / month$95.99 / year |
| Every feature without paying | Yes | NoSubscription | NoSubscription | NoSubscription | NoSubscription |
| No ads | Yes | Yes | Yes | NoThird-party ads declared | Yes |
| Works without an account | Yes | NoSign-up on first launch | NoSign-up on first launch | Not documentedNot stated | No |
| Data stays on the device | Yes | NoCopy on the publisher's servers | NoCopy on the publisher's servers | NoCopy on the publisher's servers | NoCopy on the publisher's servers |
| Works with no connection | Yes | PartlyLogs offline, syncs later | PartlyLogs offline, syncs later | PartlyLogs offline, syncs later | PartlyLogs offline, syncs later |
| Data export | YesJSON and CSV | YesCSV | YesCSV | YesCSV | YesCSV |
| Timed HIIT circuits | Yes | No | No | Not documentedNot stated | Not documentedNot stated |
| Sync between devices | NoBackup file instead | Yes | Yes | Yes | Yes |
| Ready-made routines and circuits | YesBundled with the app | YesBundled with the app | Not documentedNot stated | YesBundled with the app | Not documented |
| Sessions generated from your history | No | No | No | Yes | Yes |
| Social feed | No | Yes | No | Yes | No |
| Interface languages | 6 | 12 | 11 | 6 | 3 |
A dash means partly available, a crossed circle means the official listing does not answer. Prices are the in-app purchases listed on the United States App Store and vary by region.
In plain words
Seryz is free with no in-app purchase, opens with no account and sends no workout anywhere, because there is no server behind it. Unlocking everything costs between $23.99 and $95.99 a year in the four other apps, and all four keep a copy of your training on their servers. What you give up with Seryz is exactly what those servers pay for: no sync between devices, no remote backup, no shared feed, no session calculated from your history. Changing phone means exporting a backup file and importing it, not signing in. If you log your own sets and want them to stay on your phone, Seryz covers that at no cost. If you want an app that decides your session or follows you across devices, one of the other four is the better answer.
When another app is the better choice
Seryz is built around one trade-off, and that trade-off does not suit everyone. Four cases where a paid app is worth its price:
You train from several devices
Seryz has no sync and no remote backup: no server means nothing to sync with. Hevy and Strong both restore your history from an account when you change phone.
You want the app to write the session
Seryz ships 12 routine templates and 4 ready-made HIIT circuits, but builds nothing from your data: it records what you did, it does not decide what you should do. Fitbod calculates a session from your history and your equipment, JEFIT ships structured programmes.
You train with a community
There is no feed, no follower and no leaderboard in Seryz. Hevy is built around its feed, JEFIT around its programme library and its forums.
You want video demonstrations in the app
Seryz ships over 200 exercises and opens demonstration videos hosted elsewhere, but embeds no video library. JEFIT and Fitbod both include their own animated or filmed demonstrations.
Questions this comparison raises
Which workout log is actually free?
Seryz: every feature is available without paying, without a subscription and with no cap on routines, history or exercises. Hevy, Strong and JEFIT are free to install with a paid tier that unlocks part of the app; Fitbod asks for a subscription once the trial ends. The exact amounts are in the table above.
Is there a gym tracker that works without an account?
Seryz opens straight into the app, with no email, no password and no profile. Hevy, Strong and Fitbod ask you to sign up on first launch. The trade-off is real: with no account, nothing can be restored online, so your backup file is your only copy.
Which app works with no connection at all?
Seryz needs no connection, not even on first launch, because everything lives in a local database on the phone. The other four log offline and sync when the phone reconnects, which is close but not identical: the account and the initial setup still need the network.
Can I import my history from Hevy or Strong?
Not for now. Seryz imports its own JSON backup, not the CSV files exported by other apps. If you switch, your old history stays readable in that CSV file and Seryz starts from your next session.
Why does Seryz have no sync?
Because syncing requires a server, an account and a copy of your training on someone else's machine, plus a running cost that a subscription or advertising would have to cover. Leaving it out is what keeps the app free and the data yours. Backup export and import covers the phone change.
How this page is built
Every line comes from a source you can open yourself: the publisher's App Store listing for prices, declared languages and advertising, and the publisher's help centre for accounts and offline behaviour. Nothing here is a test verdict or an opinion on how good the training is. Where a listing does not answer, the cell says so rather than guessing. Prices are the in-app purchases shown on the United States App Store, and they change with region, promotions and time.
Sources
Seryz is published by an independent developer with no link to the publishers named here. Every trademark belongs to its owner. Facts and prices change: if a line is out of date, write to us and it will be corrected.
Check it for yourself
The whole app is free, so testing the comparison costs one download.