Klus vs Sumi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Klus
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Wij zijn KLUS. Planning-en communicatie software speciaal ontwikkeld voor MKB'ers die veel op locatie werken. Wij zijn er voor alle aannemers, hoveniers, loodgieters, verhuizers, elektriciens, schilders, stukadoors, stratenmakers, rioolreinigers, boomhuttenbouwers en alle anderen. KLUS zorgt voor een heldere planning en duidelijke communicatie, zodat jij je kunt concentreren op de uitvoering, de KLUS.***Het systeem heeft een PC-account nodig om goed te werken.***KLUS biedt je hele bedrijf helderheid en efficiëntie in communicatie en planning.Als medewerker zie je in de KLUS App precies wat, waar en wanneer er uitgevoerd moet worden. Aan het einde van de dag registreer je je uren en eventuele bijzonderheden. Al deze informatie komt weer overzichtelijk in het systeem op kantoor. Niets raakt meer kwijt, niets wordt meer vergeten. -Alle informatie op één plek Géén losse briefjes meer in de bus, in je zakken en in de prullenbak. -Digitale agenda en to-do-lijst Verbonden met al je collega's op locatie. -Efficiënte communicatie Met medewerkers en opdrachtgevers.
Sumi
This app helps you reduce phone usage by setting timers for breaks. It alerts you if you touch or move your device during the break, aiming to boost productivity and mental well-being.
- Timed phone breaks
- Movement alerts
- Productivity enhancement
- Mental health improvement
- Simple interface
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The most beautiful thing an app can do is get out of your way. Sumi sits quietly on cream paper, holds your attention for an hour, and asks for nothing back. Set a length. Put your phone face down. Pick it up before the time is done and the session breaks — not as a punishment, but as a commitment kept. No ads. No notifications. No streaks-as-slot-machines. No weekly subscription trap. Just deep work, and the quiet record of the hours you've given it. — THE RITUAL — Set an intention and a length. Put the phone down. Sumi keeps watch: lift it, or leave the app, and the session ends. When the time is held, the line completes, your lifetime hours grow, and the session is logged. Silent while you work. Quietly rewarding when you finish. — A CALM LEDGER, NOT A GAME — The number that only goes up: your lifetime hours focused. A streak, if you want one. A week that fills, a line that climbs. No characters to feed, no points, no dark patterns. Progress you can feel, with nothing engineered to hook you. — MADE FOR DEEP-WORK PEOPLE — For writers, developers, designers, students of a craft — anyone who already romanticizes focus and resents apps built to fracture it. Graphite and cream. Monospace. Paper grain. A single calligraphic mark. — PAY ONCE — Your focus shouldn't be a recurring charge. Sumi is free to use, with an optional one-time Lifetime unlock (or a subscription, if you prefer) for custom lengths, full history and trends, themes, and session intentions. Put the phone down. Pick the work up. ——— Privacy Policy: https://dayonefoundry.com/sumi/privacy Terms of Use (EULA): https://dayonefoundry.com/sumi/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Klus at none against Sumi's 3. Sumi's advantage is update cadence (every 5 days vs every 3 weeks). On price, ads, 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
Both are free to download. Sumi sells 3 in-app purchases, starting at $5.99 per month. Klus asks for nothing beyond the download.
Klus ships an update every 3 weeks, Sumi every 5 days. The most recent releases landed on September 24, 2026 and October 7, 2026 respectively.
| Parameter | Klus | Sumi |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 27 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Klus App BV | David Park |
In-app purchases
Klus
No in-app purchases
Sumi
- Sumi Pro Monthly$5.991 Month
- Sumi Pro Annual7 Days trial$24.991 Year
- Sumi Pro Lifetime$49.99









