Comparison

UTC ALARM vs FlowHour

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

Head to head
About

UTC ALARM

Features
Read full description

UTC ALARM - Set alarms in Coordinated Universal Time (Zulu time). Perfect for pilots, cabin crew, aviation professionals, and anyone working across time zones. Set alarms that trigger at exact UTC times, regardless of your local timezone. Features: • Large, clear UTC time display • Create multiple alarms with custom names • Reliable notifications even when the app is closed • Clean, dark interface optimized for iPad • No account required - works offline Free with no ads.

About

FlowHour

Features
Read full description

FlowHour transforms your iPhone into two beautiful full-screen experiences: a modern Desk Clock and a relaxing Sand Timer. Designed for focus, study, work, and bedside use, FlowHour gives you large readable time, smooth visual motion, and premium design styles that look great day or night. Features: Full-screen Desk Clock with large, easy-to-read time Sand Timer mode with smooth top-to-bottom flow animation One free design in Desk Clock and one free design in Sand Timer Premium design packs available via one-time unlock Works offline after download Clean privacy-first experience: no account, no tracking, no analytics Perfect for: Nightstand clock Desktop clock Focus sessions Study timer Minimal aesthetic setup Premium: Unlock all premium Desk Clock and Sand Timer designs forever with a one-time purchase. Notes: FlowHour is an app-based full-screen experience and runs while the app is open.

Screenshots

UTC ALARM3 screens
FlowHour3 screens

Verdict

The call

The clearest difference is in-app purchases: UTC ALARM at none against FlowHour's 1. FlowHour's advantage is update cadence (every 5 days vs every 11 days). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FlowHour sells 1 one-off in-app purchase. UTC ALARM asks for nothing beyond the download.

UpkeepUpdate frequency

UTC ALARM ships an update every 11 days, FlowHour every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 6 level
UTC ALARM versus FlowHour: the parameters behind the verdict, then further details
ParameterUTC ALARMFlowHour
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 daysEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size1 MB21 MB
Age rating4+4+
DeveloperMAXIME CLEMENT SIMON LAURENTPurpose Software LLC

In-app purchases

None

UTC ALARM

No in-app purchases

1 purchases

FlowHour

One-time1
  • Unlock All Premium Designs$14.99

Questions

Is UTC ALARM free?
UTC ALARM is free to download, with no in-app purchases.
Is FlowHour free?
FlowHour is free to download, with in-app purchases available.
Do UTC ALARM or FlowHour have ads?
Neither UTC ALARM nor FlowHour shows ads.
Which is updated more often, UTC ALARM or FlowHour?
UTC ALARM ships an update every 11 days, and FlowHour every 5 days. Most recently, UTC ALARM was updated on October 24, 2026 and FlowHour on October 25, 2026.

Other comparisons