Comparison

SmartLog (i vs Keto Logger

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

Head to head
About

SmartLog (i

This app helps users manage their blood glucose levels by connecting to compatible meters or allowing manual input. It generates reports, records related health data, and enables data sharing. Users can also sync their information with a cloud server and integrate with Apple Health.

Highlights
  • Connects to CareSens meters via Bluetooth
  • Manual blood glucose input
  • Blood glucose trend reports
  • Records meals, exercise, and insulin
  • Share data via email or push
  • Syncs data with SmartLog Server
  • Integrates with Apple Health
Read full description

SmartLog: Smart blood glucose management app for iPhone SmartLog provides the following functions to help you manage your blood glucose. (1) Connection with CareSens blood glucose meters (Bluetooth) (2) Manual Input the blood glucose value (3) Providing various reports that show trend of blood glucose value (4) Recording information such as meal, exercise, insulin and memo (5) Sharing your blood glucose data with others by sending email or push service (6) Sync(or backup) your data with SmartLog Server using "Synchronization" menu in "More" tab Works with Apple Health: If you allow Apple Health access, your blood glucose data will be shared with Apple Health App. If you have any inconveniences or improvement requests in using SmartLog, please contact our Customer Center(smartlog.ios@i-sens.com).

About

Keto Logger

Easily log and visualize your ketone and glucose readings. Supports multiple units, CSV import from popular meters, and data export. Track your progress with interactive graphs and history views.

Highlights
  • Log ketone and glucose readings
  • Support for mg/dL and mmol/L units
  • CSV import from KetoMojo
  • Line graph visualization
  • History view with GKI calculation
  • CSV data export
  • Database backup and restore
Features
Read full description

KetoLogger will help you quickly and easily log and graph your ketone and glucose readings. Enter your glucose and ketone readings with ease via the simple to use entry screens. Both mg/dL and mmol/L glucose units are supported.   You can import the CSV files from the KetoMojo meter app*. The graph tab helps you visualize your glucose vs. ketone readings with a line graph. Quickly see how you're doing with a glance. Jump quickly between date ranges to get the best picture of your progress. The history view lets you see your readings. Either glucose, ketones or using a "Both" view. In the Both view matching glucose/ketones readings are paired and the GKI is calculated. Easily export all your readings in CSV format (Two formats to chose from). A "backup manager" maintains the last few versions of the database. These can be restored or exported. Share your database between devices. If there's a feature that's missing please let us know at: missing-feature@ketologger.com GKI graphing is in the works (not sure when it will be done) but was originally skipped because I figured that graphing ketones vs glucose creates a kind of visual GKI. See my thought on GKI here: https://ketologger.com/blog/2018-08-16-ketologger-what-is-the-gki-and-why-is-it-green Keto Logger was inspired when a family member was following a ketogenic diet for health reasons. For a programmer logging and graphing ketones in a spreadsheet is not too challenging. For most other people probably a huge challenge. Keto Logger was created so that anyone with an iOS device can log and graph their ketone and glucose readings. (Also I personally have been following a low carb/ ketogenic diet since about 2003.) (* CVS import is tricky and will break if the exported format changes. If import fails then please send a mail to support@ketologger.com so we can figure out what's wrong and fix it.)

Screenshots

SmartLog (i1 screens
Keto Logger4 screens

Verdict

The call

The clearest difference is review sentiment: Keto Logger at 91% against SmartLog (i's 13%. Keto Logger also leads on rating (4.8 vs 1.6) and iOS requirement (9.3 vs 13.2). SmartLog (i's advantage is price (Free vs $2.99). On ratings volume, update cadence, ads and in-app purchases 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

SmartLog (i is free to download; Keto Logger costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Keto Logger holds the better App Store score, 4.8 against 1.6. Both are backed by a comparable volume of ratings — 118 and 298 respectively. Written reviews point the same way: 13% of SmartLog (i's written reviews are positive against 91% of Keto Logger's.

UpkeepUpdate frequency

SmartLog (i ships an update every 6 weeks, Keto Logger every 2 months. The most recent releases landed on October 22, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
SmartLog (i versus Keto Logger: the parameters behind the verdict, then further details
ParameterSmartLog (iKeto Logger
PriceFree — better$2.99
Rating1.6 (118 ratings)4.8 (298 ratings) — better
Positive reviews13.3% of reviews91.2% of reviews — better
Number of ratings118298 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.29.3 — better
Further details — not scored
Size38 MB20 MB
Age rating4+12+
Developeri-SENS, Inc.Uncomplicated Solutions Inc.

Customer experience

SmartLog (i

All ratings118 ratings
Positive11.0%
Neutral6.8%
Negative82.2%
Written reviews286 reviews
Positive13.3%
Neutral9.8%
Negative76.9%

Keto Logger

All ratings298 ratings
Positive95.6%
Neutral2.7%
Negative1.7%
Written reviews34 reviews
Positive91.2%
Neutral5.9%
Negative2.9%

User reviews

SmartLog (i

From 118 App Store ratings

What we love

  • ⭐ Works fine
  • 📊 Helpful graphs and statistics
  • 💻 Bluetooth connectivity
  • 🗓️ Tracks readings over time

Room to improve

  • 🤔 Confusing user interface
  • 🔍 Difficult to read small text
  • 🔗 Issues with Bluetooth pairing
  • 🚫 Unable to delete false readings
  • 🔒 Privacy concerns with data sharing

Keto Logger

From 298 App Store ratings

What we love

  • 👍 Simple and easy to use
  • 📈 Tracks glucose and ketones
  • 📊 Automatic graphs (Day/Week/Month)
  • 📤 Data export functionality
  • 💡 Calculates Glucose-Ketone Index (GKI)

Room to improve

  • ❌ Cannot edit entries
  • 🔄 No cloud sync / device sync
  • 🍎 No Apple Health integration
  • 🧹 Messy and clunky UI (mentioned by one user)
  • 🚫 No swipe left delete

Bugs and requests

SmartLog (i

Reported bugs

4 issues
  • App crashes after recent updates
  • Readings disappearing or not syncing
  • Compatibility issues with newer iOS versions
  • Bluetooth connectivity problems

Requested features

5 requests
  • Add dark mode option
  • Allow deletion of individual readings
  • Improve font size and readability
  • Enhance data export and sharing options
  • Integrate with more glucose meter models

Keto Logger

Reported bugs

4 issues
  • Cannot edit entries once saved
  • Data corruption (resolved by developer)
  • Import issues (resolved by developer)
  • Does not sync across devices

Requested features

10 requests
  • Ability to add notes to readings (e.g., after fast, after meal)
  • Track weight
  • Sync with Apple Health
  • Sync with KetoMojo app
  • Add readings for hematocrit and hemoglobin
Show 5 more
  • Allow custom tags for results
  • Comparative analysis or normative charts
  • Option to enter food intake (meals & snacks)
  • GKI plot showing benefit zones
  • Dark mode option

In-app purchases

None

SmartLog (i

No in-app purchases

None

Keto Logger

No in-app purchases

Questions

Is SmartLog (i free?
SmartLog (i is free to download, with no in-app purchases.
Is Keto Logger free?
Keto Logger costs $2.99, with no in-app purchases.
Which has better reviews, SmartLog (i or Keto Logger?
Keto Logger is rated higher. SmartLog (i averages 1.6 out of 5 from 118 ratings, while Keto Logger averages 4.8 from 298 ratings.
Do SmartLog (i or Keto Logger have ads?
Neither SmartLog (i nor Keto Logger shows ads.
Which is updated more often, SmartLog (i or Keto Logger?
SmartLog (i ships an update every 6 weeks, and Keto Logger every 2 months. Most recently, SmartLog (i was updated on October 22, 2026 and Keto Logger on October 23, 2026.

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