Comparison

Daytum vs Self

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

Head to head
About

Daytum

This app allows users to collect, categorize, and visualize everyday data. Create custom charts and graphs to gain insights from your tracked information. Organize data into detailed records with flexible entry formats and attributes.

Highlights
  • Collect and categorize everyday data
  • Create custom charts and graphs
  • Flexible data entry format
  • Group data into categories
  • Add detailed text and numeric attributes
  • Build pages to display insights
Read full description

Daytum helps you collect, categorize and communicate your everyday data. CREATE CHARTS AND GRAPHS With numerous options for displaying your data, the layout possibilities are nearly limitless. KEEP TRACK OF ANYTHING With a flexible data entry format, you can input and keep track of just about anything. GROUP DATA INTO CATEGORIES Group your items into categories to create more detailed records and display options. ADD DETAILED ATTRIBUTES Add text and numeric detail to your items and entries using attributes. BUILD PAGES TO SHOW INSIGHTS Group and organize your displays into pages to show insights about your data. Terms of Use: https://daytum.com/about/terms Privacy Policy: https://daytum.com/about/privacy

About

Self

This app helps you conduct self-experiments to understand the impact of behavioral changes on your health, wellness, and productivity. It provides tools to set up trials, track outcomes, and gain personalized insights through automated analysis and daily reminders.

Highlights
  • Conduct self-experiments
  • Track behavioral outcomes
  • Gain personalized insights
  • Automated statistical analysis
  • Daily check-in reminders
  • Data-driven self-improvement
Features
Read full description

Self-experimentation is the process of conducting trials where you are both the researcher and the subject. Through modifying your behaviors and reporting outcomes, you can gain concrete insights into the efficacy of whatever self-improvement you seek to make. Self-experimentation is a data-driven way to gain ultra-personal insights into the driving factors behind your health, wellness, and productivity. Through Self-E, you can set up experiments, view your data, and attain individualized insights through automated statistical analysis. Self-E sends daily reminders to check in so that your experiment stays consistent and structured.

Screenshots

Daytum4 screens
Self4 screens

Verdict

The call

The clearest difference is rating: Self at 5.0 against Daytum's 4.5. Self also leads on in-app purchases (none vs 2). Daytum's advantage is ratings volume (12 vs 2). On price, update cadence, ads and device support 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. Daytum sells 2 in-app purchases, starting at $3.99 per month. Self asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Self holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Daytum has 12 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Daytum ships an update every 2 months, Self every 6 weeks. The most recent releases landed on July 18, 2026 and June 11, 2026 respectively.

Scorecard4 real differences · 6 level
Daytum versus Self: the parameters behind the verdict, then further details
ParameterDaytumSelf
PriceFreeFree
Rating4.5 (12 ratings)5.0 (2 ratings) — better
Positive reviews16.1% of reviews—
Number of ratings12 — better2
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better14.5
Further details — not scored
Size6 MB19 MB
Age rating4+4+
DeveloperDaytumBrown University Computing & Information Services

Customer experience

Daytum

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews143 reviews
Positive16.1%
Neutral11.9%
Negative72.0%

Self

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Daytum

Reported bugs

14 issues
  • App crashes when editing entry dates/times
  • App crashes when adding entries with past dates
  • Frequent 'Unable to Save' error messages
  • Data entries disappear randomly
  • Duplicate entries created on save
Show 9 more
  • Cocoa error 1550 and 1570 on login
  • App crashes on startup or launch
  • Login authentication failures
  • App freezes on graph screens
  • Incorrect data aggregation in charts
  • Categories and entries disappear unexpectedly
  • Syncing issues between app and web account
  • App not appearing after download
  • Poor performance on iPhone 4S and older devices

Requested features

11 requests
  • In-app documentation and user instructions
  • Native iOS user authentication without web redirect
  • Additional graph types (scatter plot, bar chart, cumulative)
  • Ability to specify units for data entries
  • Multiple data fields per entry
Show 6 more
  • Timer function for tracking activities
  • Data export functionality
  • Better graphing options with y-axis markers
  • Cross-reference and filtering capabilities
  • iPhone 5 and iOS 6+ support
  • Improved category and entry management

Self

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Daytum

Subscriptions2
  • Daytum Plus$3.991 Month
  • Daytum Plus$23.991 Year
None

Self

No in-app purchases

Questions

Is Daytum free?
Daytum is free to download, with in-app purchases available.
Is Self free?
Self is free to download, with no in-app purchases.
Which has better reviews, Daytum or Self?
Self is rated higher. Daytum averages 4.5 out of 5 from 12 ratings, while Self averages 5.0 from 2 ratings.
Do Daytum or Self have ads?
Neither Daytum nor Self shows ads.
Which is updated more often, Daytum or Self?
Daytum ships an update every 2 months, and Self every 6 weeks. Most recently, Daytum was updated on July 18, 2026 and Self on June 11, 2026.

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