The honest summary
These two apps are not really competing for the same person.
STRETCHIT is a class platform. An instructor leads you through a session on video, with more than a hundred hours of instruction, new classes weekly, and classes running anywhere from five to forty-five minutes. It is aimed at people working towards real flexibility goals: splits, backbends, a studio-style practice at home. If that is what you want, this comparison should end with you downloading STRETCHIT, and Lucy will feel thin to you.
Lucy is a timer with illustrations. Sixteen routines, nothing past six minutes, built for someone who sits for eight hours and feels tight. There is no teacher, no video class and no curriculum.
The question that separates them: do you want to be taught, or do you want to be counted?
Side by side
| Lucy | STRETCHIT | |
|---|---|---|
| Format | Illustrations and a timer | Instructor-led video classes |
| Session length | 4 to 6 minutes, capped | 5 to 45 minutes |
| Library | 16 routines, 59 stretches | 100+ hours of classes, added weekly |
| Built for | People who sit all day | Deep flexibility, splits, a home practice |
| Platform | iPhone, iOS 18+ | iPhone and Android |
| Works offline | Yes, fully | Video needs a connection |
| Account required | None | Account-based |
| Free | 1 routine, complete, forever | Free to download, 7-day trial, then subscription |
| Progress tracking | Days completed only | Classes and programme progress |
Where the difference actually bites
A teacher versus a clock
A video class gives you a person demonstrating, explaining and setting the pace. That is genuinely valuable, especially for unfamiliar movements, and it is the main reason to pick STRETCHIT.
Lucy gives you an illustration, two or three written cues, and a voice that says when to switch sides. Less instruction, and less to watch: you can do a Lucy routine with your eyes shut, which you cannot do with a class.
Session length, and what the evidence says
STRETCHIT's classes run up to forty-five minutes. Lucy caps at six.
A 2025 meta-analysis in Sports Medicine, pooling 189 studies and 6,654 adults, found that gains within a single session flattened at roughly four minutes per muscle group, and that weekly gains flattened at about ten minutes per muscle group regardless of how the minutes were split.
That cuts against very long sessions as a flexibility strategy, but it is not the whole story for STRETCHIT: a forty-five-minute class covers many muscle groups, and a class is also a practice you enjoy rather than a dose you administer. If the length is the point for you, the evidence above is not a reason to avoid it.
Goals versus maintenance
STRETCHIT is built around getting somewhere: programmes, levels, a splits goal.
Lucy has three "path" routines (towards touching your toes, a full split, a deep squat) but it is not a progression system and does not pretend to be. Its centre of gravity is maintenance for someone whose problem is a chair.
If you have a flexibility goal and want structure towards it, STRETCHIT is built for that and Lucy is not.
Offline and data
Lucy works fully offline and has no account at all. Video classes need a connection, and STRETCHIT is account-based.
This matters in practice if you stretch in places with poor signal: hotel rooms, basements, aeroplanes, a van. Lucy's three no-floor routines plus full offline use is the combination built for that, and we wrote about it in stretching when there is nowhere to lie down.
Choose STRETCHIT if
- You want an instructor leading the session
- You have a flexibility goal like splits or a backbend
- You enjoy a longer practice and want classes, not routines
- You are on Android
- You want a progression structure to follow
Choose Lucy if
- Five minutes is the honest maximum you will commit to
- You sit all day and want routines aimed at that
- You want to do it offline, or without watching a screen
- You would rather have no account than a profile
- You are not chasing splits and do not want a curriculum
What neither of them does
Both are general fitness and wellness products. Neither provides medical advice, diagnosis or treatment, and neither is adapted to a specific injury or diagnosis.
Deep flexibility work in particular is worth discussing with a professional if you have a history of joint problems, hypermobility or a previous injury. Our fitness and safety note covers Lucy's position. Never force a stretch to reach a shape you have seen demonstrated.
FAQ
Is STRETCHIT or Lucy better for beginners?
STRETCHIT gives a beginner an instructor, which is useful for unfamiliar movements. Lucy gives a beginner a very low time commitment and no streak to break. The better choice depends on whether your obstacle is knowing what to do or finding time to do it.
Is STRETCHIT worth it for splits?
It is built for that goal, with programmes and instructor-led classes aimed at it. Lucy has a splits routine but no progression structure, so for that specific goal STRETCHIT is the better-designed tool.
How long are STRETCHIT classes compared with Lucy's routines?
STRETCHIT classes run five to forty-five minutes. Every Lucy routine runs four to six minutes, with nothing longer in the app.
Does STRETCHIT work offline?
Video classes generally need a connection. Lucy works fully offline, which is the practical difference if you stretch while travelling.
Can you use both?
Nothing stops you, and they overlap less than you would think: a class platform for a weekend practice and a five-minute routine for weekday maintenance is a coherent combination. Two subscriptions, though.