Comparison

Flat Habits vs Keel

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

Head to head
About

Flat Habits

Track daily or weekly habits with a focus on privacy and ease of use. Receive timely notifications and quickly log progress directly from alerts. Review your streaks and commitment, with options for offline use and data export.

Highlights
  • Set daily/weekly habits
  • Due habit notifications
  • Quick notification actions
  • Review day streaks
  • Offline use
  • Export habit data
  • Org mode compatible
Features
Read full description

A habit tracker that gets out of your way: • Set your daily or weekly habits • Get notified when habits are due • Use notification actions for quick access • Review your day streak or commitment • Search or filter habits • Keep fully offline or save elsewhere • Export your habit data at any time • Set to dark or light mode • iPad-friendly Power users: • Your habits saved to plain text • Org mode (orgmode.org) compatible • View and edit from your text editor: Emacs, Vim, VSCode... • Share/sync file with your Mac or other iPhone apps

About

Keel

Features
Read full description

Log your weight in seconds. See the trend over time. Keel makes a daily weigh-in simple: one number, a clear chart and a seven-day average that helps you see beyond everyday fluctuations. - Log in kilograms or pounds. - See your recent weights and seven-day average. - Set an optional target and a daily reminder that fits your routine. - Edit a weight or undo a change. - Connect Apple Health, free and entirely optional. Share the weights you log from then on, or bring in existing weights with a one-time import. Keel keeps days you have already logged and imports one reading per missing day. No account. No advertising. No analytics. Keel stores your weights on your device. Your weights are never sent to Mono Studio or our servers. If you choose to connect Apple Health, Keel can save weights to Health and import the weights you allow it to read. Apple Health may sync through Apple's services according to your device settings. You control access, and Keel never edits Health entries created by another app.

Screenshots

Flat Habits4 screens
Keel4 screens

Verdict

The call

The clearest difference is price: Keel at Free against Flat Habits's $5.99. Flat Habits's advantage is update cadence (every 9 days vs every 5 months). On ads, in-app purchases, 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

Keel is free to download; Flat Habits costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Flat Habits ships an update every 9 days, Keel every 5 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Flat Habits versus Keel: the parameters behind the verdict, then further details
ParameterFlat HabitsKeel
Price$5.99Free — better
Rating4.9 (58 ratings) — better—
Positive reviews87.9% of reviews—
Number of ratings58 — better—
Update frequencyEvery 9 days — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size2 MB29 MB
Age rating4+4+
DeveloperXenodium Ltd.ALASDAIR CUNNINGHAM

In-app purchases

None

Flat Habits

No in-app purchases

None

Keel

No in-app purchases

Questions

Is Flat Habits free?
Flat Habits costs $5.99, with no in-app purchases.
Is Keel free?
Keel is free to download, with no in-app purchases.
Do Flat Habits or Keel have ads?
Neither Flat Habits nor Keel shows ads.
Which is updated more often, Flat Habits or Keel?
Flat Habits ships an update every 9 days, and Keel every 5 months. Most recently, Flat Habits was updated on November 3, 2026 and Keel on October 31, 2026.

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