Daytum vs Self
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- Conduct self-experiments
- Track behavioral outcomes
- Gain personalized insights
- Automated statistical analysis
- Daily check-in reminders
- Data-driven self-improvement
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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
Verdict
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
Both are free to download. Daytum sells 2 in-app purchases, starting at $3.99 per month. Self asks for nothing beyond the download.
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.
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.
| Parameter | Daytum | Self |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (12 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 16.1% of reviews | — |
| Number of ratings | 12 — better | 2 |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 14.5 |
| Further details — not scored | ||
| Size | 6 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Daytum | Brown University Computing & Information Services |
Customer experience
Daytum
Self
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
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- 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
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- 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
Daytum
- Daytum Plus$3.991 Month
- Daytum Plus$23.991 Year
Self
No in-app purchases








