Comparison

Build, Breath, Bath vs SUNniDAY

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Build, Breath, Bath

Features
Read full description

Now it's easier than ever to plan your sessions alongside your schedule. Book classes & sessions on the go, keep your profile up to date and manage your memberships all within the app. View Class Timetable: Easily view your gym's full timetable in real time. You can see who's running the class, whether the class is full and quickly secure your spot with the push of a button. Manage Your Bookings: Schedule a session or book into a Class. You can check in on future bookings and make any changes as needed. Update your Profile: Keep your contact information up to date and choose your own profile photo. Notifications: Receive push notifications from your gym to alert you of upcoming bookings and other club events. View a full history of these communications in app so you never forget an important message.

About

SUNniDAY

Features
Read full description

SUNniDAY tracks real-time UV index and estimates vitamin D production from sun exposure, personalised to your skin type, clothing, and sunscreen. Know your burn limit before you burn. See how much vitamin D you're synthesising minute by minute. Log past sessions and review your vitamin D history over time. Features: • Live UV index from your location • Vitamin D synthesis calculator • Skin type, clothing & sunscreen adjustments • Cloud cover override to fine-tune readings • Log past sun exposure sessions • Vitamin D history chart with body-store trend • Sunrise, sunset and moon phase • Apple Health integration • Home screen widget Based on Sun Day by Jack Dorsey (github.com/jackjackbits/sunday), released into the public domain. Medical disclaimer: SUNniDAY is for general informational and educational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. All vitamin D and UV figures are modelled estimates, not measurements. Do not use this app to make medical decisions. Always seek the advice of your physician or other qualified health provider before making decisions about sun exposure, vitamin D supplementation, or any health condition — and use this app only in addition to, not as a substitute for, professional medical advice.

Screenshots

Build, Breath, Bath3 screens
SUNniDAY4 screens

Verdict

The call

The clearest difference is update cadence: SUNniDAY at every 9 days against Build, Breath, Bath's every 5 weeks. Build, Breath, Bath's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Build, Breath, Bath ships an update every 5 weeks, SUNniDAY every 9 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Ā· 3 level
Build, Breath, Bath versus SUNniDAY: the parameters behind the verdict, then further details
ParameterBuild, Breath, BathSUNniDAY
PriceFreeFree
Update frequencyEvery 5 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size84 MB3 MB
Age rating4+4+
DeveloperTreshna EnterprisesJesse Wales

In-app purchases

None

Build, Breath, Bath

No in-app purchases

None

SUNniDAY

No in-app purchases

Questions

Is Build, Breath, Bath free?
Build, Breath, Bath is free to download, with no in-app purchases.
Is SUNniDAY free?
SUNniDAY is free to download, with no in-app purchases.
Do Build, Breath, Bath or SUNniDAY have ads?
Neither Build, Breath, Bath nor SUNniDAY shows ads.
Which is updated more often, Build, Breath, Bath or SUNniDAY?
Build, Breath, Bath ships an update every 5 weeks, and SUNniDAY every 9 days. Most recently, Build, Breath, Bath was updated on November 4, 2026 and SUNniDAY on October 31, 2026.

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