100cm Ruler vs Slidely
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
100cm Ruler
This app provides a digital ruler for measuring the length and diameter of small objects directly on your device. It features a millimeter scale and allows for easy sliding to measure.
- Digital ruler functionality
- Millimeter scale
- Diameter measurement
- Screen sliding for measurement
- Ad removal option
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Plotting scale is useful to measure the length of small articles and insects. Squared in millimeters on the lower left, thus the diameter can be measured roughly. Hold the screen and slide your iPhone to the right. https://www.youtube.com/watch?v=kxU9xi88IiY Ads can be removed on "Info page".
Slidely
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Slidely is a simple to-do list you check off with a single slide. Perfect for daily packing lists, habits, and chores. Tasks don't disappear when checked—they auto-reset each day, so you can reuse the same list over and over. ■ Features ・Quick slide-toggle to check items ・Tasks auto-reset every day ・Separate boards for different uses ・Swipe left/right to switch boards ・Set notifications per task ・Clean, easy-to-read design ■ Great for ・Checking what to bring each morning ・Building daily habits ・Managing chores and routines Free to use. Remove ads with a one-time purchase.
Screenshots
Verdict
The clearest difference is ads: 100cm Ruler at none against Slidely's shown. 100cm Ruler also leads on iOS requirement (12.0 vs 17.0). Slidely's advantage is update cadence (every 3 weeks vs every 3 months). On price, in-app purchases 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. 100cm Ruler sells 1 one-off in-app purchase and Slidely sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
100cm Ruler ships an update every 3 months, Slidely every 3 weeks. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.
| Parameter | 100cm Ruler | Slidely |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 45.1% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 62 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | ZOOMO Inc. | Seiya Hirahara |
In-app purchases
100cm Ruler
- Remove ADS$1.99
Slidely
- 広告を非表示にして開発を応援できます$0.99
